There are ways around US labor laws too. Unions often get away with stealthy "work slowdowns" and "everyone call in sick" actions. Typically without any repercussions for the union or employees because it's illegal, but hard to prove.
And the point is that it is strictly legal - everything is being done exactly by the book. Even so, employers sometimes sue unions over "malicious compliance".
The company can't really force anyone to take extra overtime. The only thing they can do is fire you (well not in the Nordics but in the US I think yes?) but that will only make their problem of not having enough workers around worse.