So while the city does have a ritzy tech feel in the right parts, it is disconcerting to know that amidst so much concentrated wealth there are a lot more homeless people than you would expect. Really, a lot.

Unfortunately it's not as if these are all down-on-their-luck folks in between attempts at The American Dream. A lot of homeless people - in SF and in general - have mental illnesses and addiction problems and they do need help.