You'd presumably be making a trade off for a more efficient/responsive/differently-cultured union. This may be worth it if there is otherwise a large mismatch b

You'd presumably be making a trade off for a more efficient/responsive/differently-cultured union. This may be worth it if there is otherwise a large mismatch between who the union currently serves and you. (Or a conflict of interest; are you putting out of business one of the union's large employers?)