By criminalizing it, right?

Right?

Need to save this, in case some "conservative" moron tries to tell me again, that providing housing to homeless solves nothing.

But the right-wing idiots in Finland are working on destroying this too

In the last year, national cuts to income, social security, and housing support have resulted in the first notable change to homelessness trends in over 11 years.

Finland's population is ~5 million and ethnically/culturally homogeneous. It's relatively easy to swing things around at such small scale. Also, being homeless means being frozen dead most of the year over there. Still a very good thing, but their recipes can't be applied in a snap, not unless you're ready to pay as much tax as the Finns do (hint: it's huge amounts).