The reason why labor received more rights in Europe after WWII is that the rulers were worried about labor following the example of the Soviets. Carrot pre-empting geopolitical problems.

As soon as the Soviet Union went away, the negotiating power of labor started to weaken.

The statements above are not to be taken as an endorsement of the various kinds of genocide and horrors Communism created in the places where it ruled. It is just an observation that power, or the implicit threat of applying it, is what rules in the end. Lots of words are used to cover that raw reality.