The state can of course intervene. Happens quite often when essential workers go on strike like medical workers, law enforcement and if teachers go on strike for too long.

So you can in theory go on an indefinite strike, but the state can swoop in an decide what the new number is. In Norway we can it “tvungen lønnsnemnd”, which can be translated to “forced pay agreement”.

Nobody wants this, but it happens. In some occupations more than others.