Yeah in my second hand experience Unions in France are comprised of a small amount of registered members but since everyone gets the benefits in the company then they don’t bother doing the work. It’s a trap because that makes workers democracy a niche in which only the terminally leftists participate, alienating them from the masses, and also making lib unions super popular (when I say lib I mean literally just aiming to convince the workers that what the boss does isn’t that bad)