It’s tough being an employer in the 21st century. You run a business, you have to hire employees, yet if you take them at face value and work on your own gut instincts you can get yourself into a lot of trouble with the law if you get things wrong.
When the social security number system was created by Pres. Roosevelt during the Great Depression, it was not originally meant as a means for employee identification. In fact, politically, there were many promises made that it would not be used as a national identification system.