Firemen and police are unlikely to strike, but expect to see them to start losing bank service, office services, and trash services next. Then, expect neighboring countries to start doing the same.

Sweden has few strikes. In fact, hardly any. Worker's rights are generally by contract rather than by law. When the unions move in unison like this, they come prepared and expect to win.

It is an existential issue for them, in a literal sense. Should they lose, laws will be rewritten and trade agreements will have to be renegotiated.