I do not think the unions are the only ones to blame. If so why are the unions a problem in California (a state with private prisons) while not close to as much

I do not think the unions are the only ones to blame. If so why are the unions a problem in California (a state with private prisons) while not close to as much of a problem in places with government prisons? My theory is that the owners and the unions work together towards the same goal. The owners get a very powerful lobby group in the unions.