Well, that was my genuine question. Is that a thing? If a US union has a strike, does the rest of the world follow suit? And if so, that's problematic in itself. If it's the case.If there is a strike over this (I don't think there will be, but if there is) I would not expect well-established writers of any English-speaking nation are going to jump on board as scabs.
Honestly, I don't know how that works in practice. But - with all respect - I'm not sure that you do either.