I am no illegal hugger, but I keep thinking about Regan begging to tear down walls. Now, wouldn't it be better, and more fitting, if we expected immigrants to be certified (perfectly within the realm of technology) and employers be required to ask for proof of immigration status? Make it Mandatory! Only a idiot, illegals or liberals would oppose that. It would be cost effective, and would address all the issues. A wall? Get rid of that and put that funding into ICE.
I think you're right. In fact I have suggested the mandatory possession of biometric citizen ID cards which contain a photo, fingerprint, iris coding, various items of personal and medical data, each card instantly addressable by scanning (like a credit card) to a central database.
Anyone who employs workers should be required to have an inexpensive scanning device which functions via ordinary phone line to instantly verify authenticity.
Problem is too much opposition to mandatory possession of such a card. "Police state" implication.