The obvious is being missed here: the CX ground staff in the US are legally employed US employees, with all associated benefits. It seems likely that the US based cabin crew have been fooled into thinking all along that they were of the same status. The answer is for CX to employ all cabin staff in a US based legal business entity. Of course, now that the truth has been revealed, they will probably just threaten to close the US base if the cabin crew insist on such a resolution. Once again, the "caring employer" at it's best. To the rest of you who think trusting CX with you career is a viable option....well, good luck with that.