What really sucks is there are powerful few that actually stand up for themselves when the chips are down. People whinge and whine but many cave where the rubber meets the road. Over the years this has resulted in a divided workforce (this concept being exploited) and continually declining conditions and will continue to do so in the future. New hires on all sides undermine existing contracts and few really do anything but whine about it. Some do, but not many. Not enough to matter. And these few get excoriated by scaredey peers for rocking the boat.
It's no wonder that the vast majority of those who HAVE moved on (at least facing a longer career of having to do this for decades rather than months or days) regard leaving as one of the best decisions of their lives. Perhaps not so much on a strictly money basis but on a happiness and quality of life perspective.
So while I feel for the cabin crew in this case, I am fairly confident that many of them downline will see this as a blessing. Sometimes folks get trapped and need a nudge to find the grass is sometimes really greener.