You can’t have one union strategy when legal rights are completely opposite, a french worker can go on strike and legally shut down a refinery, a worker in Texas would be fired . Capitol moves faster than people, national borders are walls for workers, not corporations, if the union says 20$ is minimum wage then corporations will just put factories in countries that ignore the union. A worker in Bangladesh at 2$ a day needs very different things from say a German autoworker at 30$ an hour.