Ahh I see. I misunderstood what you meant with global prosperity.
I understood it as "everyone being prosperous". You mean a few individual becoming insanely prosperous at the expense of everyone else. Then you're completely right.
Unions have definitely succeeded in redistributing prosperity though (e.g. negotiating for higher wages) and also reducing exploitation (e.g. fairer working conditions).
> I understood it as "everyone being prosperous".
I meant this. Which one do you think was primarily responsible for prosperity? Unions or businesses/technology? It is by far and obviously businesses and technology.
You can't redistribute anything if you don't have the wealth to distribute it.