The person you are replying to said neither of these things. Unions, like most human institutions, have their pros and cons. They generally try to pursue the in

The person you are replying to said neither of these things. Unions, like most human institutions, have their pros and cons. They generally try to pursue the interests of their members, but their members are human and as humans, sometimes things go sideways or ultimately are self-destructive. Unions on balance do generally improve the lives of their members, but only an idiot would unconditionally approve of everything they do.