The thing that made me start paying attention to interest costs was a boring line item. Somewhere in most large government budgets there is a number for what it costs to service the debt, and for a long stretch it sat quietly below defense, below the big entitlement programs, easy to ignore. When that line starts climbing toward the top of the list, it stops being an accounting detail and becomes a political constraint. And once debt service is a political constraint, the central bank is no longer fully free to do its job. That is the short version of fiscal dominance, and it is worth understanding because it changes what different assets are actually pricing.
What fiscal dominance actually means
Under a normal regime, a central bank raises rates to cool inflation and lowers them to support growth, and the government's fiscal position is a secondary concern. Fiscal dominance is the state where that ordering flips. The government's debt load and its cost of financing become so large that the central bank can no longer set policy purely on inflation and employment. It has to keep an eye on what higher rates do to the government's ability to pay its own bills.
The mechanism is not complicated. Suppose a government has a very large stock of debt relative to its economy, and a meaningful chunk is short maturity, so it gets refinanced often. Now the central bank hikes to fight inflation. Every hike feeds straight into the interest bill on all that maturing debt. Past a certain point, hiking makes the deficit worse, because the extra interest cost outruns any slowdown in spending. The tool meant to control inflation starts adding to the fiscal hole. When a central bank quietly holds back from tightening as much as the inflation data would justify, it has started deferring to the fiscal side. That deference is the regime.
I want to be careful here, because it is easy to declare fiscal dominance every time a central bank is slow to hike. Slow is not the same as constrained. The distinction I look for is whether policy is being held back because of the debt, not because of a genuine read on the economy. That is hard to prove from the outside, which is why it tends to be recognized late.
Why post-WWII is the template
The cleanest historical version of this is the couple of decades after the second world war. Governments came out of the war with enormous debt loads relative to their economies. They did not default and they did not run brutal austerity. What they did instead is now called financial repression, and it is the playbook worth studying because a version of it is the most likely path out of any modern debt overhang.
Financial repression is a bundle of policies that quietly transfer wealth from savers to the borrower, which is the government. The pieces historically included capping interest rates on government bonds below the rate of inflation, keeping the central bank buying enough debt to hold yields down, steering domestic savings into government paper through banks and pension rules, and running inflation a bit hot so the real value of the debt erodes over time. None of it looks dramatic on any single day. That is the point. It works precisely because it is gradual and mostly invisible to the person holding the bonds.
The number that matters in that era is the real yield, meaning the bond yield minus inflation. When the government holds nominal yields down and lets inflation run above them, the real yield is negative, and a holder of government bonds is slowly losing purchasing power even while being paid interest. Do that for enough years and the debt shrinks relative to the economy without a single missed payment. Historically that is how the post-war debt was worked down, far more than through growth or spending cuts alone.
The markers of a transition
Regimes do not announce themselves, so you watch for signs. These are the things I keep an eye on, roughly in the order they show up.
- Debt service climbing up the budget. When interest on the debt starts rivaling the big spending categories, the political tolerance for high rates drops fast. This is the underlying pressure behind everything else.
- A shift toward higher inflation tolerance. Watch for the framing to change from getting inflation back to a low target quickly, toward accepting that it runs a little warm for a while. Sometimes this is dressed up as flexibility or as a symmetric target. The practical effect is a central bank that is comfortable with real yields staying negative.
- Yield curve control risk. This is the strong form. A central bank commits to holding a particular longer-dated yield at or below a set level, and pledges to buy whatever quantity of bonds it takes to defend that line. It is a direct admission that the price of government debt is now a policy target rather than a market outcome. Even talk of it, or measures that rhyme with it, is a loud signal.
- Regulatory nudges into government paper. Rules that make banks, pension funds, and insurers hold more sovereign bonds create captive demand. It rarely gets called repression at the time. It gets called prudence or safety.
- Real yields staying negative while the economy is not in crisis. A negative real yield during a recession is normal. A negative real yield through an expansion, sustained, is the tell that someone is holding the number down on purpose.
No single one of these confirms the regime. The pattern is what matters. When several show up together and persist, the odds that you are in a fiscal dominance transition go up a lot.
Why this favors hard assets, bitcoin included
Here is the part that actually changes how you position. In a repression regime, the government is deliberately keeping the return on holding its debt below the rate at which money loses value. If the safe asset is engineered to lose purchasing power slowly and reliably, capital goes looking for things that cannot be printed and cannot have their yield quietly capped by policy. That is the structural case for hard assets. Gold is the classic one. Real assets like productive land and infrastructure tend to hold up. And this is the environment bitcoin was arguably designed for, since its supply schedule is fixed and no central bank can dilute it to fund a deficit.
I try to stay honest about the difference between the thesis and the trade, because the regime plays out over years and markets move on a much shorter clock. Bitcoin in particular is far more volatile than the slow grind of repression, and it can fall hard in a scramble for cash even when the long-term logic is intact. Being right about the decade does not save you from a rough quarter.
So the way I hold this is as a regime lens, not a signal to fire on. A rough workflow:
- Track the real yield on the main government bond, not the headline nominal yield. Persistently negative through good times is the flag.
- Watch for any language or policy that pins a specific yield level. That moves the odds toward the strong form of the regime.
- Treat hard assets as a structural allocation you build gradually and hold, not a tactical bet you time. The whole thesis is about the slow direction of policy.
- Size positions so a sharp drawdown in the most volatile piece, usually bitcoin, does not force you to sell into it. If a bad quarter would make you a forced seller, the position is too big for a multi-year view.
The failure mode I see most is getting the regime call right and the position sizing wrong. People read the history, decide repression is coming, and put on a large volatile position that gets shaken out in the first liquidity scare, long before the slow thesis has any chance to pay. The regime rewards patience and punishes leverage, which is an awkward combination for anyone hoping for a quick move.
If you take one thing from the post-war record, let it be that the debt got worked down slowly, through negative real yields and mild persistent inflation, without anything that looked like a crisis on most days. The absence of drama is the mechanism. So the useful question is not whether some dramatic event is coming, but whether the real yield on safe assets is quietly negative and staying that way. If it is, you already know roughly which way the wind is set, and you can position without guessing the timing.