The guy at my hospital, he was a doctor. He worked.
Don’t think you got that right.
The INTERNAL REVENUE SERVICE CALLED ME UP AND TOLD ME NOT TO WITHHOLD FICA FROM THE GUY.
The IRS knew he was working.
Going out on a limb here, I think the IRS knows more than most on thread. They called me because I refused to stop FICA and the hospital had the IRS call me personally but guess what?
I WAS WRONG!
It happens.
... the FICA tax issue is irrelevant for some of these visas ...
My point was that these are mainly student/training visas that are intended to be temporary. Your Pakistani guy was probably working as part of a "professional training/exchange" program. I'm not sure which of the four visas listed in the main article he was working under, but I'm sure it was 100% legitimate.
There are several questions here that are unanswered.
What type of visa?
Was he a resident (student) or an attending?
And the IRS is often WRONG.