There is no doubt that the U.S. immigration system is broken and needs fixing, this is a complicated political issue that is currently being debated in Congress. Conditional on this unfortunate reality, which we can't immediately change, my advice is not to over-react.
Don't deflect blame onto the system, either. I will accept many excuses for many job choices. I will not accept any excuses for being paid to do this kind of evil. If their behavior were mandated by immigration law (and it's not), they would still be 100% culpable.
