[bsder]

> If housing isn't the solution to homelessness, what is?

Decent, long-term medical facilities.

The problem is that solution is expensive. It's way cheaper to simply move the problem somewhere else (jail, different neighborhood, etc.) than fix it.

In addition, it has odd failure modes. You want to create a cluster of people to amortize the healthcare costs. However, your treatment options generally want your homeless to be separated as much as possible. The standard treatment for drug addiction generally starts by separating the patient from those who also do drugs or who provide access to drugs, for example.