Several of my managers in my career are literally bought out by China.
Outside WF, a manager only hires Chinese h1b recent graduates. Except I applied for the role and they can't offer my job to the H1b worker in his queue. So he gives me he-l for years.
I frequently ask for work to do, because every single projects is reserved for Chinese nationals. I simply cannot transfer knowledge forever.
He filed complain to EAP that I
(1) "Speaking loudly asking for work to do" and
(2) "Annoying him everyday asking for work because he is very busy"
I stopped, follow his direction to give all the help H1b workers ever needs on a full time basis. 3 years later I was laid off.
The manager keeps to hire more H1b, with the additional transferred knowledge from the few American pushed out.