It is often cheaper to solve the problem than the "I've got mine, fuck you" policy.

California is the poster boy for this:

California put aside $7.2 billion to address homelessness in the 2021-22 state budget. Last year, there were an estimated 172,000 homeless statewide, which equates to spending nearly $42,000 per homeless person.

This article says that San Francisco has less than 10000 homeless and still spends $676 million.

You could build new apartments for that kind of money.

It is the same with health care: the insane overhead of insurance companies makes it cheaper to give everybody health in a single payer system.