Union memberships can and should simply take control and provide services directly to the public, cutting out the State, as well as shareholders, as middlemen.

H'mmmm.

That challenges the domination of The Top whether that "Top" is a union president, the president of a bank, the leaders of the Labour Party, & so forth.  Any local union trying to "take control" will find the first and third of the previous list coming down on them like a ton of bricks.  

She believed in nothing; only her skepticism kept her from being an atheist. -- Jean-Paul Sartre