Feds would have to approve your employment using the Social(ist) Security number, the "mark" to be employed.

Problem is it is no proof of citizenship as the "experts" claim in this article. Check for yourself: your birth certificate is not an accepted document by the SSA, but a drivers license is, and you can get a drivers license without being a citizen. But it is not that they are stupid. The fact is their are lying (like in REAL ID, which also requires SSN) to set this up.