> If the state needs someone who is unemployed to work for it, it should give her a contract and pay her a wage. You can’t make someone who receives welfare benefits work more than those benefits are worth anyway. That would obviously be unjust.

Unjust?

Why should taxpayers pay to have someone do nothing?

That person is consuming resources produced by other people.

> I’m not exactly sure why the state shouldn’t hire that person instead of forcing it to work for it.

There's no force. If said person can get a better deal than a dole check in return for picking up trash, said person is free to take it.