The multitrillion-dollar patchwork of federal and state relief programs has not kept bills from piling up or prevented long lines at food banks. But it has mitigated the damage. Now the expiration of those programs represents a cliff that many Americans and the economy are hurtling toward. The $1,200 checks are long gone, at least for those who needed them most, with little imminent prospect for a second round. The lending program that helped millions of small businesses keep workers on the payroll will wind down if Congress does not extend it. Eviction moratoriums that are keeping people in their homes are expiring in many cities.

And the $600 per week in extra unemployment benefits that have allowed tens of millions of laid-off workers to pay rent and buy groceries will expire at the end of July. President Trump and other Republicans have played down the need for more spending, saying the solution is for states to reopen businesses and allow companies to bring people back to work. So despite pleas from economists across the political spectrum — including Jerome H. Powell, the Federal Reserve chair — any federal action is likely to be limited.

To some Republican lawmakers, extra unemployment benefits and other assistance made sense when businesses were shut down and the government was discouraging people from leaving home. But as the economy reopens, they say, the benefits could impede the recovery by providing an incentive not to return to work.

Many economists feel those fears are overblown. Generous benefits might be a deterrent to work in normal times, they argue, but these are hardly normal times. Even the most optimistic forecasters expect the unemployment rate to be well above 10 percent when the extra benefits expire, meaning there will be far more jobless workers than available jobs.