In the short term, the plan cuts a bit of discretionary nondefense spending, a category that in fact has not grown particularly rapidly. This is a mistake. With unemployment at 9.1 percent, and long-term joblessness at record levels, we need more spending, not less. But the agreement all but rules out new spending to boost the economy, at a dangerous time. The chances of a double-dip recession are growing — and a further slowdown will increase, not reduce, the budget deficit.

The longer-term spending and revenue commitments are no better. Certainly spending, in particular on Medicare and Medicaid, needs to be restrained. But the deficits cannot be reined in without tax increases, and the “framework” does little or nothing in this regard. The S. & P. decision to downgrade reflects, in large part, the expectation that Republicans will not allow the Bush tax cuts to expire.

The recent skirmishes all dance around the central issue: the United States is in the midst of the world’s largest debt crisis. The Treasury now owes the public almost $10 trillion, including $4.5 trillion to foreigners — and that doesn’t include what households and companies owe. For decades to come, Americans will face the core problem of every heavily indebted nation: who will bear the burden of adjustment?

Countries borrow for many purposes: canals and railroads in the 19th century, factories and highways in the 20th, and in the last decade, a housing and financial boom in Europe and America. When the projects don’t pan out and the debtor country falls into crisis, what happens to the accumulated debts? Who pays? Creditors or debtors? Workers or investors? Rich or poor? The European Union is tearing itself apart over this question, which divides creditor nations from debtor nations and which divides groups within nations. The American variant of this conflict is just beginning.

Perhaps, some Americans believe, we can shunt the adjustment costs onto foreigners. Indeed, our creditors worry that the United States will reduce its debt burden the old-fashioned way, by inflating it away. A few years of moderate inflation, and a weaker dollar, would significantly lessen the real cost of servicing the country’s debts — at our creditors’ expense.