ElNono, you laugh but it's true. The feds have already set up e-verify so it's simple for an employer to check immigration status on a new employee. Make the penalties tough enough and employers will quit hiring undo ented workers. They could shut town the underground/untaxed economy if they wanted to. First offense for hiring illegals a week in jail and $10,000.fine for the boss. Second offense a month in jail and $50,000 fine. Third offense 2 years and $100,000 fine for the boss. For a big corporation the penalty is for the guy that hired the illegal AND the CEO. Enforce it very publicly.
The other thing they would have to do is use e-verify to qualify for public benefits...no lone star card, now WIC, no nothing without clearing e-verify.
You REALLY think that wouldn't kill the job market for illegals? If there are no jobs and no benefits, why come?