Well, TBH, any illegals that are using a fake SSN to work are paying money into the system that they won’t receive (we will).
There will be an accepted electronic version of the vax card soon. And the submitted card will be verified. Just wait for the knuckleheads to start submitting fake cards to that, and landing in jail.
I bet a cup of coffee you’re one of those who got vaxxed.☺