How do liberals deal with the cognitive dissonance of "There is no owning class that conspires for their class interests" and "The only union the politicians support is the police union"?

The politicians and their benefactors don't support unions for service workers. They don't support them for the manufacturers or the laborers that operate critical infrastructure. But they do support the cop unions. How can they dance around class warfare as the answer to this conundrum? They must just avoid thinking about it too hard.