I was about to post the same thing, this very much sound like a hawthorne effect. Being homeless also can come with strong feelings of isolation and rejection f

I was about to post the same thing, this very much sound like a hawthorne effect. Being homeless also can come with strong feelings of isolation and rejection from society which can then demotivate and be an addition source of depression. So the attention and actual sustained help can not only improve their financial but also their mental state - both are needed.