How many Mastercards are there floating around with your account number being used? These cards should also be tied to a bank account and the access to their payroll checks. The banking account number is set up with many checks that can be refined as time goes on. A counterfeiter who would try to use somebody's number would generate a termination order. That would require someone to go back to their home country and get a new card. Not a happy prospect. The countefeiter would be severely punished if caught. There are many ways that could be used to safeguard the system. I am not really as good as the experts.
No employers of illegals will even bother checking the cards. Frist's plan does not deal with that. The problem is border security and enforcement. HR 4437 would be more enforceable than what we have now. Frist's bill is just another brand of amnesty. It's not comprimise. It's a thinly-veiled surrender that the pols hope will get us off of their backs because they will sell it as 'reform' or 'comprimise'.