Government policy encourages homeless people to congregate in public areas twice over: first, cities destroy access to very-low-cost housing. Second, city governments often refuse to enforce their own rules of public-space use. Tent cities result.
Oberlin College faculty openly encouraged and assisted students in destroying the property and livelihood of employees and owners at Gibson's Market. The college claimed this was "freedom of speech." A jury disagreed.
Modern Monetary Theory is the new thing among progressives. But it's been tried by many others, including the Roman dictators who ruined the Roman economy and had Rome falling apart before the barbarian invasions.