The Cost of Buying Time

Handing Warsh a harder choice

Bessent's quip that growth will take care of America's $40 trillion debt has not yet proven true. In the meantime, high rates are making the arithmetic worse, with interest expense already absorbing close to 20% of federal revenue, more than the defence budget.

However, what matters is not simply the size of the debt, but whether it can be serviced. Bessent's intervention in response to the selling at the long end of the yield curve left us with yet another impression of policymakers reaching for levers and deferring harder choices.

On the intervention itself, this is not QE because the overall stock of debt that the government holds does not decline, so the operation is broadly liquidity-neutral. It is not, however, duration-neutral. Treasury is replacing long-duration debt held by the private sector with short-term debt, effectively reducing the amount of duration the market needs to clear.

Bessent's Gambit

Besides relieving pressure on the long end, it also changes the policy game. By shortening the maturity of the debt, Treasury makes the government's financing costs more sensitive to the Fed's policy rate. The longer rates remain high, the faster a greater share of the debt stock has to be refinanced at those rates, pushing the interest bill higher. For Warsh, this creates an uncomfortable dilemma but perhaps not the one that is immediately obvious.

If Warsh wants to avoid fiscal dominance, the orthodox response would be to resist Treasury's financing pressures. Keeping rates high, or even hiking further if inflation requires it, would demonstrate that the Fed will not subordinate monetary policy to the government's debt burden.

But, at some point, the fiscal constraint can become economically more important than the inflation constraint. Not because the Fed acquires a debt-service mandate, but because an increasingly large interest burden starts to affect growth, fiscal sustainability and financial conditions, and potentially feeding back into inflation itself.

This is where Bessent may be changing Warsh's payoff matrix. By changing the maturity of the debt, he can make the cost of keeping rates high increasingly visible.

Warsh is therefore left choosing between maintaining restrictive policy and allow the fiscal burden to intensify, or ease policy and risk validating the very fiscal dominance he has spent years warning against.

Cooperation, not capitulation

This may also explain Warsh's interest in closer cooperation with Treasury.

Warsh has been outspoken about fiscal dominance and about how years of exceptionally low rates allowed Washington to run large deficits with relatively little financing pressure. Yet he has also argued for greater cooperation between the Fed and Treasury, beyond their regular weekly lunch.

Those positions need not be contradictory because both institutions could coordinate for a period to help reshape the government's financing profile and stabilise financial conditions, while ultimately returning to a more orthodox separation between fiscal and monetary policy. Cooperation could be a bridge to a cleaner starting point, rather than an acceptance of permanent fiscal dominance.

There is a historical precedent. During and after WWII, the Fed worked closely with Treasury to finance the war and maintained low yields for years. Once the emergency had passed, however, the arrangement became increasingly incompatible with price stability. The conflict eventually culminated in the 1951 Treasury–Fed Accord, which restored monetary independence.

The lesson is not that Treasury–Fed coordination is inherently inflationary. It is that temporary coordination becomes dangerous when markets stop believing there is an exit.