Which just means the homeless population had 40 years to be - for the lack of a better word - 'enriched' with people who should have gotten psychiatric help (and them being on the street is unlikely to have made them become better).

> They are, in fact, very vulnerable, the weakest people out there.

I agree, and I think they ought to get the help they need, and what happens to them in the US is criminal. That still doesn't mean I would let my kid run unsupervised in an open-air forensic psychiatric ward.