You know what would make farming even cheaper? Child labour. So would indentured servitude. Or why not consider slavery? After all we've established that we're fine with breaking the law so that certain industries have lower operating costs, so these should all be on the table. No one wants to pay more for food.
Besides, child slaves do the jobs Americans don't want to do! You're socially immoral if you don't support it.
Besides, child slaves do the jobs Americans don't want to do! You're socially immoral if you don't support it.