I've watched so much soft white underbelly interviews with skidrow homeless people, hookers and drug addicts that I'm fairly convinced there is no cure, because it's largely people that have been broken by abuse and violence that were never given the tools (mental or otherwise) to make good decisions.

For the working poor or people who are forced to live in cars because rent is too high, that's a hard one, because people use real estate as an inflation hedge / store of value. This would be a fix the money issue, but none of the legacy players or governments would want a true monetary fix because it takes away too much of their power and control