Scott Bessent’s strategy was built for a different interest-rate environment. The idea was relatively straightforward. Reduce the pressure on the long end of the Treasury curve by buying back longer-dated bonds, limit future long-maturity issuance and finance a greater share of America’s borrowing needs through shorter-dated securities. In theory, that helps contain the 10- and 30-year yields that determine mortgages, corporate borrowing costs and, increasingly, the political perception of whether American debt remains affordable. Then the Federal Reserve raised rates. And changed the equation. The dollar immediately strengthened, and the Treasury curve flattened as short yields rose faster than long ones. That is good news for Bessent in one sense. Warsh has done what Treasury buybacks could not. He has restored some credibility to the fight against inflation. The 10-year yield slipped back below 5% after the decision because investors became more confident that the Fed would not allow inflation to drift permanently higher. But the relief creates another problem. Bessent’s strategy increasingly depends on borrowing short at precisely the moment short-term money is becoming more expensive.

Treasury recently tripled the maximum size of some long-dated buybacks to $6 billion. The objective was partly to improve liquidity, but markets inevitably interpreted the move as another attempt to reduce pressure on long yields. The reaction was disappointing: long-term yields continued rising because the underlying forces — inflation, fiscal deficits and debt supply — remained intact. Buying long bonds does not eliminate government debt. It changes where the government finances it. If Treasury reduces long-dated issuance and increases bills or shorter notes, it effectively shortens the maturity of the federal balance sheet. That works beautifully when short-term rates are falling. It becomes much less attractive when the Fed is hiking. As a result, monetary tightening reaches the federal budget much faster. This matters because the starting point is already uncomfortable. The US fiscal deficit reached $1.97 trillion through August of the current fiscal year, already above the full-year deficit recorded in 2025. Interest payments are running 13% higher than a year earlier, up roughly $143 billion.

A Treasury strategy that increases reliance on short maturities therefore creates a simple trade-off. Bessent can reduce duration pressure in the bond market. But he increases refinancing risk in the budget. The government pays less term premium. It accepts more interest-rate volatility. And the Fed now controls the interest rate that increasingly short debt is exposed to. That creates an extraordinary policy contradiction. Treasury wants lower borrowing costs. The Fed wants tighter financial conditions. Bessent wants to reduce the pressure on the long end. Warsh is increasing the price of money at the short end. Both can succeed simultaneously for a while. The curve simply flattens. But the fiscal bill does not disappear. It migrates.

There is also the dollar. Before this week, one risk in Bessent’s strategy was that aggressive attempts to suppress long-term Treasury yields could shift the market’s adjustment mechanism away from bonds and into the currency. If investors are prevented  from demanding a sufficient fiscal premium through long yields, they can demand it somewhere else. The dollar is the obvious candidate. For the moment, Warsh has interrupted that process. The hawkish Fed pushed the dollar to a seven-week high as investors repriced the US rate path. Higher short-term rates restore part of the dollar’s yield advantage and reinforce demand for US assets. But that support should not be confused with a solution to the fiscal problem. A stronger dollar generated by tighter monetary policy is fundamentally different from a stronger dollar generated by fiscal confidence. The first requires higher rates. The second requires confidence in the sustainability of the debt trajectory. America currently has much more of the first than the second.

This is why the next phase becomes difficult. If inflation falls, the Fed can eventually reverse course. Short rates decline. Treasuries can refinance bills more cheaply. Bessent’s maturity strategy begins to look considerably smarter. If inflation remains persistent, the opposite happens. The Fed keeps rates high. Short-term debt repeatedly refinances at elevated yields. Interest expenditure rises. The budget deficit worsens. Treasury issues more debt to finance the higher interest bill. And the original attempt to make government financing cheaper begins producing more debt that itself needs financing. That is the fiscal feedback loop to watch.

Bessent can influence the curve’s shape. He can alter issuance. He can buy back longer bonds. He can temporarily reduce the amount of duration the market has to absorb. What he cannot do is determine the interest rate environment in which all of this takes place. Warsh now does that. And after Wednesday’s Fed meeting, the uncomfortable conclusion is becoming clearer. Washington can choose where it borrows on the yield curve. It cannot choose the price of money at both ends.