medical expenses
There are obviously none of those here fortunately, however it's easier (and cheaper) to pay UK-style child benefit, which this more or less is.
I have seen women do her nails with child support money
Not perhaps ideal if someone's short of cash, however they'd have done their nails on the even less money that they had without it. And at least going to a nail bar is putting something back into the economy, as well as making the single mother in question feel a bit better about herself.