As an aside, I’ve seen this happen elsewhere as well. Classic play for wage theft. When I was working as a bartender in London to make ends meet, I had a coworker from Mexico on an expired visa. Great guy and the most hardworking. Well won’t you guess it, guy got picked up by immigration authority on payday.
This is specifically why historically reporting your exploitation has been a path to citizenship for illegal/legal immigrants in the united states. It wasn’t a well known endeavor though , and I doubt it’s functioning has continued