There is of course one very simple solution write a legal letter to the company explaining that as you have no wish to become involved with IRS filing of tax returns . Thus if the company insists on this course of action you will no longer accept any flights to the USA . If everyone does this that will be the end of the matter .
As non resident foreign crew members paying taxation in HK we are not subject to usa taxation . This whole thing is bs and whoever decided this should be fired . Being CX they will be promoted .
Lufthansa , BA , Emirates , Qantas to the best of my knowledge do not file individually with the IRS so why are we any different