What makes you think that unions want a "decent living for their members"? When I worked in a union job, I didn't make shit and I don't think the union gave a shit.
The union is concerned, as always, with feathering their own beds. Extracting what they can from the members and the employers so they can pay their bar tabs at the Italian Club and live a good life.
They aren't opposed to others doing well, but they aren't altruistic, and are more interested in what they can do for themselves.
I've met a lot of union business agents and committee people in my life, the Youngstown Ohio area which I grew up in is still full of Italian Americans, and I certainly aren't against them doing their thing. In fact, I like those fellows and always have.
But don't tell me that they are mother teresa types, I really know better.