Many union members with no marketable skills will be terrified. If one union is liquidated, I doubt the others will have the courage to strike as well. After all, they have their own pensions to worry about.
Nearly every union in the city will go out. As much as I like quality entertainment, I wouldn't want to see that.
I agree - they would all go out. and you would also see private union workers going out on "wildcat" strikes - electricians, manintenance trades of all kinds (elevator repair, etc).