UAE labour law is to protect employers, not employees. Hence organized labour is illegal.
As far as the cabin crew, it doesn't really seem that any duty rules apply to them whatsoever. Oh, sure, there is lip service paid to rest days and the like but who ever witnessed a "rule" that couldn't be waived when EK wanted it. Throw in the sociopathic CC "managers" and it's like something from a Dickens novel.
So they get what they deserve: massive resignations and embarrassingly high attrition rates. I say good on 'em.