The debt limit is supposed to make Congress think twice before passing tax cuts or spending increases that add to the national debt. Instead, lawmakers routinely support policies without paying for them — like the Bush-era tax cuts and two wars — and then posture and protest when their decisions require raising the debt limit.

So it will be once Congress returns from its spring recess. The debt limit — $14.3 trillion — will be hit as early as mid-May. If it is not raised in time, the government will have to use increasingly unorthodox tactics to meet its obligations, which would disrupt the financial markets and the economic recovery.

Default is theoretically possible, though public outrage over the mess would likely compel Congress to raise the debt limit before then. The best approach, the most sensible and mature, would be to pass a clean and timely increase.

However, nothing sensible or mature is on the horizon. Republicans have vowed to extract more heedless spending cuts in exchange for their votes to raise the debt limit. To that end, they seem likely to demand changes to the budget process, like a balanced budget amendment to the Constitution, or spending caps.