Unions like government prioritize what ever the vocal, loudest, and most organized minority of the group wants prioritized, this will not align with all members, and rarely even aligns with what the majority of members desire
A recent example: the WGA just ended a strike against the movie and television studios and from what I've read about it, the resolution was not determined by the loudest minority. A deal was worked out, the membership voted, and 99% voted to accept the agreement. That seems like a success.
