Harrison, I agree that in today's world unions are an anachronism. However, I am sympathetic to what they were able to accomplish in the early to middle 20th century. Financial interests were able to collectivize their capital into corporations, so the corollary to that was the collectivization of labor into unions. The initial primary goal of unions was to obtain a greater share of the productivity their individual members were generating. After a great struggle they were able to accomplish this.
But they went too far. They started wanting more for less productivity. This brought about their doom, along with all the others depending on industrial prosperity.