> If you're looking for compliant employees, why go through the trouble of hiring an h1b employee, bringing them from a different country and paying all the fees associated with processing visas and probably a green card process, and paying them the same or higher (usually, the outsourcing body shops are generally the places that play below market for h1b) ... if you can just find and American to do the same thing?

The argument is that you can't, because American workers know their rights - rights that every employee should have and stand on, but sadly those from other countries don't always know about.