They hate all other unions too and do nothing to contribute to labor activism across various sectors like you see all the time with unions that fall under the afl-cio or SEIU. Lots of states actually have special carveouts so they are the only public sector working allowed to have so-called "unions" even though they like to call themselves deceptive sounding names instead like the Police "Benevolent" Association or "Fraternal Order of the Police" (which sounds a lot more like a secret society/frat than a union. They plead for the right to collectively bargain and organize but then think it should just apply to them and more in a way that seems like blackmail or a mob protection racket than an agreement that is supposed to be a compromise between the workers and the elected representatives of the taxpayers.

Unions always protect bad employees, public or private sector.