I spend roughly 700 a year in union dues. I make 25-30% more than those in my industry without a union. So while it is true that I could buy an xbox if I wasn't in a union, the reality is I can buy all consoles and a gaming PC with enough money left for a vacation BECAUSE I'm part of a union.
That doesn't even factor in healthcare benefits, more PTO than I can remember to use, or the fact that my bosses will never yell at me because they don't want to deal with the fallout from the union. The lack of yelling alone is worth the union dues for me.