UH OH: Wave of Debt Payments Facing U.S. Government. “The United States government is financing its more than trillion-dollar-a-year borrowing with i.o.u.’s on terms that seem too good to be true. But that happy situation, aided by ultralow interest rates, may not last much longer. . . . Even as Treasury officials are racing to lock in today’s low rates by exchanging short-term borrowings for long-term bonds, the government faces a payment shock similar to those that sent legions of overstretched homeowners into default on their mortgages.”