Offer free plane and bus transportation back home to every illegal immigrant in the U.S. Being unemployed in Mexico is a lot cheaper for all concerned than being unemployed in the U.S.
Do it right now. We could call it the:
I'll Be Home for Christmas planThe government should set up booths at Greyhound stations. All an illegal immigrant has to do is walk in with his luggage, get fingerprinted and photographed, sign a legally binding document that he won't be coming back and will go to jail if he does, and he'll be on his way home on the next bus with a $100 gift certificate usable at some chain store that only operates in Mexico.