[DrTiTus]

People are becoming homeless not because there are zero houses/rooms empty, but because there are zero houses/rooms they can afford.

Simple fix - no new loans on rental properties, and banks should call in loans on existing rental properties. If you don't 100% own a house, you don't have the right to rent it. Prices would plummet as most landlords would be forced to sell, and the old "someone else is paying my mortgage ho ho ho" game would come to an end.

If you can currently afford rent, you could probably afford to buy the house you live in if house prices halved. People would be more financially secure, and be able to loan money to each other to help them afford the deposit.

Of course our financial masters would hate this, so we'll continue to pay the cost socially while they receive money for nothing. But let's keep blaming this or that resource act and pretend we just need more brand new houses for landlords to rent out to people who can't even afford the worst ones.