"ALPA" doesn't strike anyway, only a specific airline MEC can do that. I know of two or three who are or have been very ready to do it, and probably would have been allowed to eventually but with business booming, airlines are willing to pay up to avoid that kind of disruption, bad PR, and lost business. So I'm not expecting any actual major airline strikes. But somebody could get released if management drags it out long enough.

There is some reality that a union's approach to politics will be influenced by it's membership, sometimes even to it's own detriment on specific narrow interests (such as contract leverage). But the members are free to choose, and there are other priorities in life besides how much money you make on the job... don't necessarily want to burn the house down just because you're chilly.