This is because results don't matter under liberalism, only intentions.

edit: Well there are lots of reasons, actually, but I think that's one of them. I think the article makes a really profound point in passing: "Government is now paying the tab for services that used to be undertaken by families, churches — or, frankly, no one."

Now, I'm sure some of this can be attributed to the fact that San Francisco attracts a lot of out-of-towners, because of its beauty, history, jobs, etc. But I think part of it is also due to the ruling liberal ethos of radical individualism, where everyone must be free to do as he wishes without constraint (as long as he doesn't infringe on anyone else's right to do the same). Such radical autonomy must invariably involve the rejection of social obligations. After all, no one chooses into which family to be born, and most people don't choose the church they will grow up with, either. Follow this logic to its conclusion and all you're left with is democratically elected government, expressing the "will of the people".