The socialist system has a problem with this phenomenon as well. When state owned enterprises or quasi SOE companies are at risk due to stupid decisions or just the way technology and society evolve, the government steps in because they don't want to unduly risk all the jobs. It was the sickness of 1970s Britain that required Thatcher's shock therapy.
In those scenarios they were worried about the overweighted votes of the union leaders.
Now, to keep it real, the US does not have that problem at all in any sectors except sports and entertainment. E.g., If a union of nurses were to fight a labor action to keep a hospital open, people would laugh and jeer at the ridiculous nurses.