[danceparty]

Quite simply, homeowners do not want homeless people in front of their abodes, and will vote to make sure it remains that way. What would you do if put in the position of said homeowner? It becomes a more difficult decision when its literally on your doorstep

[falcolas]

Enforce residential only parking where its appropriate?

EDIT: Which seems to be almost exactly what they did, per TFA.

[namlem]

I would lobby the government to build more affordable housing, not to pass laws criminalizing poverty. That just pushed the problem somewhere else.