Baloney....they are PROBABLY illegal...with illegal SSI numbers.
Most of the illegal aliens I know that worked, used false I.D, they can go to the black market and get a drivers license, a S.S. Number. Then you have one I.D at work, NEVER use your real name, so when you get picked up as Juan Hernandez, and in their file, and go in 8 years to the Embassy as Jose Garcia to get your visa legally. I’ve gotten false ID. told them it was my TRUE name, and they laughed, that is what they all say...
Yep, they use numbers amoungst themselves, relatives trade numbers, they make up numbers, and there is a black market for numbers, etc. When the payroll service or HR department catches it they just say it was a mistake and give another number and around it goes again. Short time day labor is paid in cash though.
When the INS shows up at work sites they all scatter and never show back up. Then the contractor starts all over.
Although years ago the Vietnamese and Cambodian laborers were legal they did have a nationwide underground communications system that notified what part of the country has jobs and what kind. They would move like the old seasonal field workers of years ago.