Here is an enlightening article, Tax Laws Protect Illegal Workers, and proof that illegal immigration cannot be solved without a major paradigm shift.
Everybody must be fully involved and committed to kicking illegal immigrants out. If one agency does not cooperate, the efforts of the rest are undone. As long as they can find jobs, obtain assistance and other services, we cannot stop the flood. And that is a bad thing. We must starve them out, and we must start now. Confiscatory fines for employers, drop the illegal Mexican immigrants off on the south side of Mexico, immediate deportation for the rest. No respite in the court system, no mercy from the Executive branch. It must be done this way, and it must start today, because it is unfair to those who followed the rules and are here legally. It is the legal immigrants we should be kind to, for they are following the legal American Dream.