I think that when immigrants don't complain about poor conditions, many of them are making a reasonable cost-benefit analysis, considering the risks of retaliat

I think that when immigrants don't complain about poor conditions, many of them are making a reasonable cost-benefit analysis, considering the risks of retaliation, unemployment, deportation, etc. Changing the system to shift the costs and benefits would make a difference. Employers of these immigrants are also making a cost-benefit analysis. Even if only a few percent of exploited workers complained, a well-designed policy could make employing such workers untenable.