…Republicans did. While I’ve criticized the Biden administration over its COVID (non-)policies during the last few years, see if you can find what is wrong with this description by the Washington Post (boldface mine):

As updated coronavirus vaccines hit U.S. pharmacy shelves, adults without health insurance are discovering the shots are no longer free, instead costing up to $200.

The federal Bridge Access Program covering the cost of coronavirus vaccines for uninsured and underinsured people ran out of funding…

At least 34 million doses of last year’s vaccine were administered to adults, according to the Centers for Disease Control and Prevention. Of those, 1.5 million were funded through the Bridge Access Program, which was originally set to end this December, allowing vaccinations ahead of the usual winter wave.

But it expired ahead of schedule because Congress rescinded $6.1 billion in coronavirus emergency spending authority as part of a deal to avert a government shutdown. Congress also declined to fund the Biden administration’s proposal for a Vaccines for Adults program that could provide routine immunizations, including for coronavirus, for free, similar to an existing Vaccines for Children program.

It wasn’t Congress, it was congressional Republicans who opposed this. Republicans have been trying to end this funding for nearly two years. This is driven in no small part by ideology, because they believe Democrats misuse emergency spending to expand government (AAAIIIIEEE!!!), so emergency spending must be limited, even if it’s still needed. Meanwhile, a whole bunch of people will become needlessly ill or die.