This is a variation of the trolley problem, isn't it? Do you risk the harm of those workers losing jobs (not necessarily a given, but lets say worst case), or more widespread, less acute harm from unenforced labor regulations (law abiding businesses less profitable, proliferation of shady businesses, workers denied benefits req'd by law, etc)?
I think in your shoes, I would ask, if there are 100 guys nationwide facing your same dilemma now, and another 100 in 6mo or so, and so forth, how would you as a citizen want them to respond? That's what you should do.