I hear this a lot as if the groups and people talking about exploitative work situations aren't also pushing for things that would make these situations less exploitative and to make the consequences of not working less dire through socialized health care or similar programs... That's tough to do in the US system for a number of reasons so one thing that probably has to happen before the legislative solutions can happen is to get more people to realize they're being taken advantage of. (At the very least it should make it easier to address!)