It simply means nobody would be allowed to hire any illegals so they will just leave on their own. You don’t need some massive bureaucratic police state to go after everyone.
I see no mention of self-deportation (such as the likes of Fred Thompson have used). And once again, 'common-sense' is the giveaway. I don't trust Newt as far as I could throw him. He will be like McCain in promoting amnesty while pretending what he is selling isn't amnesty.
In other words, he's just another Beltway oil slick.