Ironically I think this is a good example of one of the weaknesses many people see in unions. Here we have a group of people who have voted "against their collective interest" (which is a dubious claim imo, but let's assume that it's true for the sake of argument). If they were already unionized, what's to stop them to similarly keep voting "against their collective interest", as viewed by one individual within the organization? All of this to say, I don't trust a large group of other people to vote for what's best for me personally. See also: US presidential elections, usually close to a 50/50 vote, where most people consider "their side" to be unequivocally aligned with their own interests, and the other side to be heinous and corrupt. Peoples perceptions and the objective truth are rarely aligned when there's money and campaigning involved.
(Throwaway because being anti-union is unfortunately taboo)
(Throwaway because being anti-union is unfortunately taboo)