Hmm. I wonder if you could say "if someone becomes homeless in your locality, your locality has failed them". And then rate localities/states by their net loss of citizens that have fallen "outside society". Then begin incentivizing communities to fix these problems. There's only so much a local community can do with limited funds, but while I'm sure the majority of homeless in California are Californian... I would love other states to take ownership of citizens they export/extrude. :s