You can buy SS# on black market (dark web) along with facebook groups and craigslist. There isn't a huge demand for it since it's unethical and illegals don't need it right now, but if someone is here illegally and needs a idenity to work what makes you think they won't pay someone a few hundred for an identity? RFID chips/cards will need to be replace over time, lost or stolen.
@VivaRevolution Don't get me wrong it's not a bad idea it should happen, but being that won't deter people coming here illegally, someon is always going to pay cash for lawns being mowed, houses being painted ect. I think you need layers of defense a wall, e-verify and more ....We will be spending money either way for illegals like we do now, so spend the money to input in layers of defense so to speak
(sorry about my spelling I got a gnarly hangover)