Exactly, reduced form of citizenship. You want to come here outside of the system, we will let you, but you don't get any benefit other than making more than $0.2 per day like you were. No welfare, no unemployment, no SS, no FICA. If their employer offers health insurance they can have that, hell, they can even sign up for ACA (yes, I know, that's our tax money to some extent). They could reap the benefits of not having the extra taxes taken out, they just don't get to collect. If and when they become citizens, they can get a new SS Card that would allow them access to all benefits and tax burdens that a 1st class Citizen would get. The health care portion of it would take some work but you get my drift.