The political argument against it is "I don't want a single dime of my money going to worthless scumbag lowlifes who are too lazy to get a job" or "anything the government does is by definition wasteful, the private sector needs to handle this problem like all problems" -- the same one that galvanizes the right against welfare, regulations, healthcare, etc.

The conservatives we have in the US are so extreme they make even the ones in Canada look very, very liberal. A proposal like that here would induce horrible rage and kicking and screaming about "the free market" and "entitlements". Someone would be called a communist. Maybe impeached. Conservatives run on platforms of removing programs that help the poor, not starting new ones.

There's a reason the blog poster addressed his open letter to the chief of police, and not to a local homeless charity with a check attached. He doesn't want to help solve the problem, he just wants to whine about it really loud to powerful people without doing any work or spending any money and hope it goes away.