The illegals will be sent out of the country as the wall is built.
They’re paid in cash from subcontractors. Tracking that down is impossible.
If you make the % too high they’ll just avoid it driving money over or the cartels will set up something.
2% works.
How about disallowing any sort of welfare for non-citizens, so they wont have the extra money to send back in the first place?
Nothing prevents President Trump from Ordering the Treasury Department to immediately stop accepting ALL Federal Reserve Notes and Credits from Mexico. That would FORCE them to Exchange their Federal Reserve Notes for Pesos IN THE USA, that is when we TAX THEM!