Kagemusha Economics
When the Body Double Falls — Fiscal Dominance, the Measure of Value, and What Endures
The Body Double
Akira Kurosawa’s 1980 film Kagemusha tells a parable about the nature of power. Takeda Shingen, the most powerful daimyō of Japan’s Warring States period, dies suddenly during his campaign toward Kyoto. To prevent rival forces from exploiting the vacuum, the Takeda clan conceals his death and installs a look-alike thief as his body double — the kagemusha. For a year and a half, this impostor successfully deters the cunning Oda Nobunaga and the calculating Tokugawa Ieyasu from making a move.
But when the double’s identity is accidentally exposed through a horse-riding incident, everything collapses in an instant. Nobunaga and Ieyasu, upon confirming Shingen’s death, immediately launch their assault. The Takeda forces are annihilated by massed musket volleys at the Battle of Nagashino, and the once-mighty clan disintegrates in a chain reaction of defection and defeat.
The core question Kurosawa poses: what actually sustains power and order? His answer — expectations. Even when the substance of power has been entirely hollowed out, as long as the existing framework remains in place, as long as other actors continue to believe the power is real, the system can coast for a surprisingly long time. Power does not need to prove itself through action at every moment. It persists, more than anything, through the expectations held in other people’s minds.
But precisely because power rests on expectations rather than substance, when change comes, it comes instantaneously. The transition from “everyone believes” to “no one believes” is not a gradual process — it is a phase transition.
Kurosawa’s original intent was to use the Warring States setting to discuss the survival of Japan’s imperial institution after World War II — the Emperor’s actual power had been entirely hollowed out, yet the institutional framework and public expectations allowed it to persist to this day. The same logic, applied to the current American fiscal and monetary situation, is strikingly apt.
Fiscal Dominance
In economics, there is a concept that maps almost perfectly onto the kagemusha parable: fiscal dominance. In 1981, Thomas Sargent and Neil Wallace first systematically articulated this framework in their seminal paper Some Unpleasant Monetarist Arithmetic. They demonstrated that when the government’s fiscal behavior — spending and borrowing — is unconstrained, monetary policy must ultimately yield. The central bank’s primary objective of controlling inflation becomes subordinated to the Treasury’s financing needs.
Wallace characterized this relationship as a “game of chicken”: two cars hurtling toward each other at high speed — whoever swerves first, loses. Under a monetary dominance regime, the central bank holds firm on its inflation target and refuses to swerve; the Treasury is forced to cut deficits and live within its means. But under fiscal dominance, it is the Treasury that refuses to swerve — the government continues to borrow and spend on a massive scale — and the central bank must ultimately accommodate by maintaining low interest rates, purchasing government debt, or outright monetizing the deficit.
Two dominant policies cannot coexist indefinitely. The prime directive of macroeconomic policy is to determine and control the aggregate price level while stabilizing government indebtedness to ensure sustainability. If fiscal and monetary policy pull in opposite directions, this cannot be achieved. Ultimately, one must yield. The question is: who blinks first?
Habitually Risk-Free
Map the kagemusha metaphor onto today’s dollar system — US Treasuries are the body double.
A nation’s debt and currency stability require credibility on two dimensions: fiscal credibility and monetary credibility. Concretely, this means at least one of the following: hard-money backing, sustainable fiscal discipline, and an independent central bank credibly committed to not debasing the currency.
Examine the United States against each criterion. Hard-money backing ended in 1971 when Nixon closed the gold window. Fiscal sustainability is increasingly questionable with federal deficits running at 5.8%-6.3% of GDP and the debt-to-GDP ratio crossing 100%. The last line of defense — Federal Reserve independence — faced unprecedented strain during the post-2020 era of massive quantitative easing and direct fiscal monetization.
In New York not long ago, someone posed a direct question to Howard Marks: are US Treasuries actually risk-free? Marks reflected for a moment and replied — when it comes down to it, they are still “habitually” risk-free.
“Habitually risk-free” — these words describe the kagemusha state with unsettling precision. It is not that people are unaware Takeda Shingen may no longer be alive. But as long as no definitive evidence shatters the belief, the system keeps running. The depth of the US Treasury market, the dollar’s reserve currency status, the path dependency of a global financial infrastructure built around the dollar — these are the framework propping up the body double. The framework is real. What is inside the framework is no longer what it once was.
The Hollowing
How was the substance inside the framework hollowed out? The process unfolded in stages.
Paul Volcker crushed inflation between 1979 and 1982 at the cost of inducing recession, establishing the Fed’s credibility. This was the high-water mark of monetary dominance — a central bank proving it would bear political costs to maintain price stability. The Greenspan and Bernanke eras, while far from perfect, at least maintained the framework of independence and inflation targeting in nominal terms.
The 2008 financial crisis was the inflection point. Successive rounds of quantitative easing, near-zero interest rates, and the Federal Reserve’s balance sheet expanding from under
The numbers tell the same story. Federal debt held by the public climbed from roughly 40% of GDP in 2008 to 97.4% in 2024, 99.8% in 2025, and crossed 101% in 2026. The Congressional Budget Office projects it will reach 107% by 2029 — surpassing the post-WWII historical peak — and 156% by 2055. All of this while the economy is not in recession, with federal deficits running at 5.8%-6.3% of GDP. At the current pace of nearly 10% annual debt growth, the math itself is unsustainable even without a crisis.
The surge in post-pandemic inflation was the body double’s first public stumble — the impostor revealing a crack in front of the audience. People began accelerating the conversion of cash into other assets — real estate, equities, commodities — not merely because of the increase in money supply, but because of the erosion of the last layer of trust: that an independent central bank would not debase the currency.
The Pressure Valve
From the fiscal authority’s perspective, if the austerity narrative doesn’t work, you must tell a growth narrative instead.
US Treasuries are, in essence, claims on future taxation rights. If economic growth is fast enough to expand the tax base, then current debt levels become sustainable. There is historical precedent: US debt peaked at 120% of GDP after World War II, but 3-4% real growth brought that ratio down to roughly 30% by 1980. Growth genuinely can solve a debt problem — if the growth is real.
This is why the AI narrative is not merely a technology story — it is a fiscal pressure valve. If the US can persuade markets that AI will deliver a second-industrial-revolution-scale productivity leap, then the current debt trajectory can be reframed as a rational investment in a high-growth future.
This is not to suggest conspiracy. But at a minimum, the fiscal authority has both motive and means. When you need a credible narrative to justify ever-growing debt, a technological revolution that plausibly reshapes the productivity curve is the best story available. The question is whether the math actually works: with a 5.8% deficit-to-GDP ratio and sub-3% nominal growth, the productivity gains AI must deliver are enormous.
Adam Smith’s Mirror
When discussing the erosion of monetary credibility, there is an old mirror worth revisiting. Adam Smith devoted an entire section of The Wealth of Nations (1776) — later called the “Digression on Silver” by scholars — to analyzing the relationship between precious metal prices and the health of the monetary system.
Smith observed that the gold-to-silver ratio in his era stood at roughly 14-15:1. But what concerned him more was the historical impact of a singular event: the Spanish discovery of vast silver deposits in the Americas, particularly at Potosí. Smith wrote that the discovery of the abundant American mines “reduced the value of gold and silver in Europe to about a third of what it had been before.”
Spain experienced the Price Revolution (1535-1650), with an extremely close correlation between treasure imports and commodity price inflation. As early as 1556, Azpilcueta Navarra of the Salamanca School observed that “goods and labor were given for very much less in times when money was scarcer than after the discovery of the Indies” — one of the earliest articulations of the quantity theory of money: more money, higher prices.
But Smith’s own analytical framework differed from the Salamanca School’s. He offered a cost-of-production theory: silver lost value not merely because there was more of it, but because the American mines made it drastically cheaper to produce. Like any commodity, when production costs fall, value falls. The two frameworks converge in the modern context: when fiat currency can be created by keystroke at near-zero marginal cost, whether you apply the quantity theory or the cost-of-production theory, the conclusion is the same — the intrinsic value of such money trends toward zero. The only force sustaining it is institutional trust — the kagemusha.
But Smith’s true purpose in analyzing the gold-silver ratio was not to demonstrate inflation — it was to attack mercantilism. Mercantilism was the dominant economic doctrine from 1500 to 1776: a nation’s wealth equaled its stock of gold and silver, so policy should maximize exports and minimize imports to keep precious metals flowing in. The logic had real-world grounding — kings needed specie to pay armies, international trade settled in metallic coin, and Spain became Europe’s dominant power precisely when American silver was flooding in. But Smith identified a fatal counterexample: despite importing more treasure than any nation in history, Spain actually declined — because it never developed productive capacity, and the gold flowed right back out to pay for imports from England, the Netherlands, and France. Smith countered that precious metals were “just the same as any other commodity,” and that the real source of wealth was labor and productivity. This makes the modern rush by central banks to hoard gold deeply ironic: when 76% of central banks expect gold’s share of reserves to rise, is this a rational hedge against a failing fiat system, or a new age of mercantilism? Smith would likely argue that gold itself cannot make a nation wealthy — but when the trust underpinning a credit-based monetary system begins to crack, the retreat to “just another commodity” may be precisely what reveals the severity of the problem.
The gold-silver ratio cannot by itself prove fiscal dominance, but it records where trust is migrating — when capital flows broaden from gold alone to silver and tangible assets more widely, the market is pricing not just panic but a systematic distrust of paper promises.
Here is the gold-silver ratio’s trajectory across monetary regimes:
| Era | Monetary Regime | Gold/Silver Ratio | Dominant Reserve Currency |
|---|---|---|---|
| Ancient Egypt (3200 BCE) | Commodity money | 2.5:1 | N/A |
| Biblical era | Commodity money | 15:1 | N/A |
| 1792 US Coinage Act | Bimetallism | 15:1 (legal) | British pound |
| 1834 Coinage Act | Adjusted bimetallism | 16:1 (legal) | British pound |
| 1880-1914 | Classical gold standard | ~15-18:1 | British pound (£4.25/oz fixed) |
| 1944-1971 | Bretton Woods | ~20-40:1 | US dollar ($35/oz fixed) |
| 1980 | Post-Nixon Shock | ~17:1 | US dollar |
| 1991 | Post-Cold War | ~100:1 | US dollar |
| 2011 | Post-GFC QE | ~45:1 | US dollar |
| March 2020 | COVID panic | 123.3:1 (all-time high) | US dollar |
| 2024-2025 | Current | ~85-92:1 | US dollar |
| March 2026 | Today | ~61.6:1 | US dollar |
This table should be read on two levels. Short-term extremes reflect liquidity panic, not monetary regime judgments: the ratio's spike to 123:1 in March 2020 was driven not by gold surging but by silver collapsing — as an industrial metal in a market expecting economic shutdown, silver plunged from ~
The real fiscal dominance signal lies in the full trajectory since 2020. From that panic low to today, gold has risen from ~
It is worth noting that the barometer's meaning depends on which metal carries the monetary function — a point validated by a mirror case in Ming Dynasty China. After Zhang Juzheng's Single Whip Reform (一条鞭法) in 1581 mandated tax payments in silver, China effectively operated on a silver standard. Because silver carried the monetary function and thus commanded a demand premium, the gold-silver ratio in China was only 6-8:1 — far below Europe's concurrent 12-15:1. The cross-regime gap was itself a barometer: it revealed two competing monetary systems pricing the same metal differently, and the flow of Spanish silver to China via the Manila galleons was the market's arbitrage response.
The logic is consistent across eras: whichever metal carries monetary or reserve status commands a demand premium, shifting the ratio in its direction. Ming China chose silver as its base currency, pulling the ratio down; today's central banks choose gold as their reserve asset, pushing the ratio up. The direction of the ratio tells you the system's choice; the movement tells you where confidence is migrating.
More telling is gold priced across major currencies. As of early 2026, gold has hit all-time highs in virtually every major currency: above $5,100/oz in dollars as of early March 2026, €2,635/oz in euros, ¥12,792/gram in yen, ¥601/gram in yuan. When gold rises against all fiat currencies simultaneously, the dominant driver is less likely gold appreciating in isolation than fiat currencies collectively depreciating against real assets. This is the kagemusha’s stumble in slow motion.
But the flight to gold is itself worth pausing on. Before Adam Smith, gold and silver simply were wealth — a premise the mercantilists never questioned. Smith overturned it in The Wealth of Nations: the true measure of wealth is not precious metal but labor. Today’s renewed rush toward gold raises the question: are we reverting to the world Smith tried to dismantle?
Yet the deepest question Smith leaves us may have nothing to do with gold or silver. Smith chose labor over precious metals as his measure of value because labor appeared to have an irreducible cost — it consumes human time, effort, and skill. A day’s labor is a day’s labor; this “yardstick” was more stable than metals subject to supply shocks. The entire value theory of The Wealth of Nations rests on this assumption.
But what if AI can replicate specific types of labor at the marginal cost of electricity? Then labor — the very denominator Smith carefully selected — loses its stability. Value is no longer measured in human “toil and trouble” but in kilowatt-hours. When the yardstick itself is shrinking, every measurement taken with it loses meaning. This is not merely deflation — it is the destabilization of the value measurement system itself.
The paradox then becomes nearly circular: governments need AI-driven growth to resolve the debt crisis, but AI-driven growth is destroying the unit in which “growth” is measured. This is the kagemusha’s third layer: in 1971, hard-money backing was hollowed out; from 2008 onward, fiscal credibility was hollowed out; and now, labor — the very foundation on which Smith built his entire theory of value — is being hollowed out by AI. Each body double that falls reveals another body double beneath it.
But perhaps the mercantilists grasped something Smith overlooked. If we cannot anchor value to labor (AI is undermining it), nor to fiat currency (fiscal dominance is eroding it), nor even define “what has value” philosophically, then all that remains is supply and demand. And behind demand lies human desire — the one truly irreducible constant. Keynes called gold “a barbarous relic.” But the relic endures precisely because the barbarism — the eternal human craving for tangible scarcity — endures. The mercantilists were wrong about the theory, but perhaps right about the instinct: when every unit of measurement is collapsing, hoarding what humans perpetually desire may be the last rational act.
How the Central Banks Are Voting
If market prices are a mix of noise and signal, central bank behavior is the purest signal — because they are the system’s operators, and their actions represent a judgment on the system they run.
Since 2022, central banks have purchased over 1,000 tonnes of gold annually for three consecutive years — the most sustained accumulation since the end of Bretton Woods. In 2024, Poland was the largest buyer (+90 tonnes), followed by Turkey (+75 tonnes), while China accumulated for 18+ consecutive months. BRICS central banks collectively hold 6,026 tonnes, still trailing the US at 8,133 tonnes, but the gap is narrowing.
According to the World Gold Council, 76% of central bank respondents expect gold’s share of global reserves to be higher in five years; 73% expect lower dollar holdings in global reserves. The catalyst is clear: the 2022 freezing of approximately $300 billion in Russian foreign reserves by the US and allies sent a signal to the global financial community — dollar-based assets now carry political and sanctions risk. Central banks are voting with their actions: within the very system they operate, they are choosing to accumulate gold and reduce dollar exposure.
On October 31, 2025, the BRICS-affiliated International Research Institute for Advanced Systems (IRIAS) launched a research pilot called “The Unit,” pegged to 1 gram of gold and backed by a 40/60 mix of physical gold and BRICS national currencies, designed for trade settlement between member nations. It remains a research initiative rather than treaty-level monetary architecture, but it represents a direction of institutional thinking.
After the Body Double Falls
If fiscal dominance is real and the growth narrative insufficient to bridge the gap, what alternatives exist to the dollar system?
Gold — the oldest hard money. No counterparty risk, no sanctions risk, accelerating central bank accumulation. But no yield, high storage costs, and difficult to scale for trade settlement.
The euro — lacks fiscal union; the ECB is constrained by member-state disagreements. Structural flaws prevent it from becoming a true reserve currency alternative.
The renminbi — capital controls and a trust deficit are the primary barriers, though RMB usage in bilateral trade settlement is growing.
The yen — Japan faces an even more severe fiscal dominance problem, with debt exceeding 250% of GDP.
Bitcoin and crypto assets — the digital gold thesis has logic, but volatility, regulatory risk, and the absence of sovereign-level institutional adoption limit its role as a reserve asset.
Commodities and real assets — oil, copper, farmland as stores of value. These are the “other things” people rushed to convert cash into after the pandemic.
Here lies a paradox: the kagemusha persists precisely because there is no visible replacement. As of 2024, the dollar still constitutes 58% of disclosed global official foreign exchange reserves, far ahead of the euro at 20% and the renminbi at barely 2%. The IMF’s data shows the dollar’s reserve share has been remarkably stable even after adjusting for exchange rate movements. Add to this the dollar’s network effects, the petrodollar system, military backing, and the unmatched depth of the Treasury market, and no alternative can displace it in the near term. But the lesson of the kagemusha is exactly this — the body double eventually falls. The question has never been whether, but when.
Paper Cannot Contain Fire
The lesson of the kagemusha is clear and unforgiving: expectation-based systems can persist for a long time — the Takeda body double lasted a year and a half; the dollar system’s “body double” has lasted over half a century. But its end will not be gradual.
For those watching, several signals are worth tracking: the trend in the gold-silver ratio; central bank gold purchases as a leading indicator; bid-to-cover ratios at US Treasury auctions; the gap between real and nominal yields (breakeven inflation); changes in foreign official holdings of US Treasuries; and the growth of non-dollar trade settlement among BRICS nations.
When the moment of belief-reversal arrives — just as Nobunaga immediately mobilized his forces upon confirming Shingen’s death — everything will change in a very short span of time. But the kagemusha teaches us one more thing: the body double can persist far longer than the shorts can remain solvent. This is not a question of market timing. It is a question of structural allocation — whether your portfolio has made room for the inevitable phase transition.
Like Takeda Shingen, no matter how powerful the inertia, paper cannot contain fire.