How this will impact employers who suspect they may have hired illegal immigrants? Right now, as it stands if the Police stop you for any violation they have probably cause; they can check your immigration status. But is suspicion by an employer probable cause?
Here's where a national ID system can help. Employers could just ask for their ID, along with drives license and be reasonably sure the person is legal. (Yes I assume all forms of ID can be forged).
Now of course immigration is far less a concern as its has tapered off during the recession but that trend would reverse itself as the economy improves.
In the meantime, I'm all for completing the border fence, and installing military bases along the border, and utilizing drones to monitor border crossings.
Best Regards
Vog