Communism

For example i know a few people who buy places and fix them up to rent out. Are you saying they should get their properties taken away?

Treating housing as a commodity is part of the problem for sure. I believe all humans have a right to safe shelter. No one's income should come before another person's life.

That said,

If you're only referring to billionaires and corporations buying housing, i agree.

This would be the practical way to do it anyway. Some guy that rents out a ski chalet isn't commiting some terrible crime. It's charging people to live in their own homes that's wrong.