Earlier quoted context omitted.
Unions would be much more attractive if US were an open shop country. Instead, we’re closed shop, which means that, once a union is in place, you can’t choose to join a different union. This routinely leads to situations where corrupt unions abuse their own members. For an example of how this works in practice, look at the UAW’s conduct with UC’s grad students. Years ago, they negotiated salary caps for grad students…
I did not think all union contracts where closed shop in the USA. And this case why on earth where professional roles being represented by an Auto workers union.
An innovation in organized labour from around the turn of the 20th century known as the "industrial union" (as opposed to the "craft union") wherein the union seeks to organized all workers in a particular industry rather than a particular job. The idea is that this prevents workers of different jobs being pitted against one another, and provides more power as a strike could shut down an entire industry.