America != Norway. American labor unions have (had?) a reputation for corruption, dragging companies down with inefficient and parasitic practices and in some cases being controlled by organized crime (https://en.wikipedia.org/wiki/International_Brotherhood_of_T...).
Isn't the question then about the lesser evil? It's wrong to deny unions on the basis that some people are corrupt. Some people in companies are corrupt too and the US lies squarely in the middle of the corruption index https://en.wikipedia.org/wiki/Corruption_Perceptions_Index?w...
I don't see why America!=Norway is a relevant argument.