[anamax]

Not at all. They'd merely have to pay a "living wage".

Moreover, we have a lot of legal residents and citizens on "aid". Lots of them can do farm work. (Yes, I know how hard farm labor is. I've done it. Have you?)

As to child care, the ones who can't do farm labor can provide it. After all, we trust them with their kids, so surely we can tell some of them that their aid depends on them taking care of other people's kids. (Of course, we'd have to break the social workers hold on such activities. Welfare programs are pretty much designed for the providers.)

Farm labor costs are a very small fraction of total food costs.