Maybe there's an amount limit that passes under the Patriot Act radar. In Wal-Mart every Friday evening is a line of Mexican looking people waiting to transfer money. I would guess they transfer $200-300 each.
Maybe, but you try to open a bank account and look at the documentation the bank will require. How do the illegals do that?
Here in NJ you have to jump through hoops to get and renew a drivers license, producing all kinds of government documents (birth certificate, SS card, marriage license, etc.); how do the illegals do that?