That's just BS.
As for the agreement, it should not pass Congressional muster unless we can get something very solid in trade from Mexico. It makes no sense to return SS taxes to illegal workers. If and when they become legal, that would be a different ballgame.
If it was NOT confidental, how come they had to use the Freedom of Information act to get it? (if we're talking about the same thing. i'm on my first cup of coffee)