75% of Turkers are Americans. And I didn't see it in the OP but I would guess that similarly 75% of companies issuing HITs are American.<p>Now I don't know the exact wording of minimum wage law, but I'm pretty sure if you hire an independent contractor through a 3rd party staffing company, let's say to clean houses. And then you set a fixed price on the service, say you will pay $20 for each house cleaned, knowing it takes 4 hours on average to clean a house. And then you let anyone who wants it take the job. This would be illegal.<p>So, I honestly don't know how mTurk is allowed to operate the way they do. American companies should not be able to hire American workers to perform labor at below minimum wage, just because they use an API to do it.<p>I'm willing to bet if someone was willing to spell it all out in front of the right AG or the right class action legal team that there would be significant settlements to be had.