When the Bond Vigilantes Wake Up
Economist Chris Sims once described the Fed’s fight against inflation in the 1970s as “stepping on a rake.” The mechanism was brutally simple: higher interest rates increased the government’s interest bill, larger deficits created more inflationary pressure, inflation pushed rates higher again and monetary tightening began feeding the problem it was supposed to solve. The loop could only be broken when bond investors believed that the government was actually willing to restore fiscal discipline.
Paul Volcker eventually proved that monetary policy could crush inflation, but the more important part of the story came from the bond market. CPI fell from roughly 14% in 1980 to 3% in 1983, yet the 30-year Treasury still yielded around 11%, because investors did not believe that the fiscal problem had been solved. The market was effectively demanding a political answer. Ed Yardeni gave these investors a name: the Bond Vigilantes.
And they eventually won. Reagan raised taxes and cut spending, George H. W. Bush introduced PAYGO, Clinton raised taxes and reduced spending and by 1999 the United States finally produced a federal surplus, the first since 1969. In 2001, Alan Greenspan could even tell Congress that paying off the federal debt before the end of the decade was within reach.
That was the last great American fiscal reset.
Since then, the opposite experiment has taken place. Deficits became permanent, debt exploded and yet the bond market largely stopped demanding compensation for the fiscal risk. The global savings glut, foreign purchases of Treasuries, price-insensitive buyers, the absence of attractive alternatives and enormous faith in the Federal Reserve allowed Washington to borrow on increasingly generous terms. After the financial crisis, the government borrowed hundreds of billions while the Fed expanded its balance sheet by trillions and inflation still fell.
The lesson investors absorbed was extraordinarily powerful: deficits did not necessarily produce inflation, debt did not necessarily produce higher yields and the Fed could always be counted on to suppress financial stress. The Bond Vigilantes went to sleep.
Now they appear to be waking up.
The problem is that the United States is entering this confrontation with a completely different balance sheet from Volcker’s America. When Volcker pushed the federal funds rate toward 20%, federal debt was roughly 30% of GDP. Today the ratio is around 100%, while annual interest costs have moved above $1 trillion. The same mechanism that was painful in the 1980s becomes potentially explosive today: higher rates increase interest payments, interest payments increase deficits, deficits increase Treasury issuance and larger issuance requires investors to demand higher yields.
At some point monetary policy ceases to function as cleanly as textbooks suggest. A rate increase intended to destroy demand simultaneously transfers more income from the government to holders of Treasury securities, injecting purchasing power into the private sector. Tight monetary policy can therefore become partially self-defeating when fiscal dominance is sufficiently large.
And that leaves Congress.
But Congress has no obvious solution.
The 1990s playbook is politically dead. Raising taxes enough to stabilise the debt would require millions of voters to accept a direct reduction in their disposable income, while cutting the largest spending programmes would mean telling millions of Americans that their Social Security, Medicare or other government payments will grow more slowly or become less generous. There is no meaningful political coalition demanding this. Both parties can disagree violently about almost everything while sharing a remarkable consensus on the one issue that matters most to the bond market: neither wants to impose the fiscal pain required to balance the books.
This is where the historical record becomes relevant.
Britain and France repeatedly experienced their largest fiscal explosions during major wars. War created the political legitimacy for extraordinary borrowing, allowed governments to mobilise resources on a scale that would have been impossible during peacetime and created an economic environment in which debt could later be reduced through inflation, reconstruction, growth, taxation and financial repression. The important historical pattern is therefore not that war makes countries richer. It is that war makes politically impossible fiscal actions possible.
That distinction becomes critical when looking at today’s deficits. Britain and France eventually inherited a world in which extraordinary wartime finance had become chronic peacetime borrowing. The deficit no longer required an existential justification. Governments simply spent more than they collected, year after year, while voters became accustomed to the benefits and increasingly hostile to the costs of reversing them.
The United States is now moving toward the same problem from a position of much greater power.
America still possesses the world’s dominant financial system, reserve currency, military infrastructure and technology sector, which means that it can postpone the reckoning far longer than most countries could. But postponement is not resolution. Every additional year of deficits increases the stock of debt, every additional dollar of debt increases future interest costs and every political promise that cannot be financed through taxation increases the eventual adjustment required.
There are only a few ways out: much higher taxes, much lower spending, sustained inflation, financial repression, extraordinary economic growth or some combination of them.
The first two are politically toxic. The third eventually damages the credibility of the currency and the bond market. The fourth transfers wealth from savers to the state while risking the capital markets on which American dominance depends. The fifth would require an economic expansion of a magnitude that cannot simply be legislated into existence.
And this is where war enters the equation.
Not because American policymakers necessarily sit around calculating how to use war to erase the national debt. That explanation is too simplistic. The more important mechanism is that war creates the political conditions under which the state can suddenly spend without having to explain why the money is unavailable.
Defence spending becomes national security. Industrial policy becomes strategic mobilisation. Debt-financed investment becomes necessary preparedness. Supply-chain restructuring becomes resilience. Energy policy becomes security. Higher inflation becomes an unfortunate consequence of mobilisation rather than merely the result of fiscal irresponsibility. Political opposition becomes easier to portray as weakness when the language of national survival enters the debate.
War therefore provides something that ordinary fiscal policy no longer provides: political permission.
And history suggests that this is precisely when the danger increases. When governments have exhausted the peaceful mechanisms for reconciling spending promises with available resources, external conflict can become extraordinarily useful even without anyone explicitly viewing it as a fiscal solution. It creates demand, absorbs industrial capacity, legitimises deficits, redirects capital and allows the state to postpone questions that would otherwise become impossible to avoid.
For the United States there is an additional advantage: the war does not have to happen on American soil.
America’s geographic position is unique. The United States can mobilise enormous economic resources for an external conflict while leaving its own industrial core, financial centres and civilian population largely intact. European, Asian or Middle Eastern conflicts can therefore generate American defence demand, reinforce alliances, redirect foreign capital toward US assets and increase dependence on American security and financial infrastructure without producing the destruction that historically accompanied total war on the homeland.
This creates an uncomfortable asymmetry. A war in Europe can weaken European industry while increasing American defence production. A conflict in the Middle East can increase the strategic value of American energy and military power. A confrontation in Asia can accelerate the relocation of semiconductor production and strategic investment toward the United States. The same conflict can therefore impose enormous costs on America’s competitors while simultaneously reinforcing the institutions that support American capital markets.
That is the deeper connection between the Bond Vigilantes and geopolitics.
If the bond market again demands fiscal discipline, Washington faces a problem that cannot easily be solved through the Fed. If Congress refuses the tax-and-spending adjustment, monetary policy becomes constrained by the size of the debt. If inflation remains politically unacceptable and austerity remains politically impossible, the system searches for another mechanism capable of justifying large-scale government mobilisation.
History suggests what that mechanism can be.
The real danger is therefore not that America has discovered some secret economic benefit from war. It is that the peaceful alternatives are disappearing. When taxes cannot rise, spending cannot fall, inflation cannot remain uncontrolled, debt cannot stabilise and voters refuse the adjustment, the political system eventually begins searching for an external problem large enough to make extraordinary government action acceptable.
The Bond Vigilantes may be waking up, but they are waking up in a country that no longer has the political will that defeated them in the 1990s.
And that is the uncomfortable conclusion: if the United States eventually finds that its economic, financial and political mechanisms can no longer resolve the debt problem, the remaining mechanism may not be fiscal discipline at all. It may be mobilisation.
And historically, the most powerful form of mobilisation has always been war.
The only question is whether the next American war would have to be fought at home.
It probably would not.