One of the major problems with US unions is a hangover from racism. Can’t remember the USSC decision off the top of my head, but the TL;DR is that there was a railroad union that wasn’t defending African-American members. The USSC essentially said that unions have to defend everyone. The downside to this is that it created an adversarial relationship between unions and management. If Joe Bag O’Donuts is a chucklehead, the US union still has to defend him. This leads to rubber rooms and job banks. In a German union, everyone can agree that Joe needs to go and that’s it.