Since you're so worried about this problem why not try learning the first thing about it? I'm sure you know people in your life who have become addicted to various substances, which is at this point widely recognized as an issue of mental health. Hopefully those people had enough of a safety net to avoid becoming homeless. If not, well, now they're caught in a vicious cycle. Kicking a drug addiction is hugely more difficult when you're facing housing insecurity, and when you're facing housing insecurity your likelihood of self-medicating with drugs and developing an addiction is also hugely more likely. Housing insecurity also makes it much more difficult to find & keep a job to get income and alleviate the insecurity, as does having a drug addiction. Of course, there are also expensive non-addiction-related health issues which make it more difficult to work - and it's more difficult to manage the condition while homeless. All of this is rendered much worse by high housing costs - you need to make more money to achieve housing security, and your likelihood of becoming homeless from financial stress is also much higher.

You look at this problem in your community and your solution is to ignorantly push for it to be someone else's problem. I repeat, utterly pathetic. You are not a serious person.