You’re saying that public sector unions can be good because sometimes their interests are aligned with that of the public and sometimes the state is not. This

You’re saying that public sector unions can be good because sometimes their interests are aligned with that of the public and sometimes the state is not. This does not generally happen, though the unions will say it does. On average, the conflict is as I described. On average, a typical person does not benefit from the union position. The edge case is not interesting.