When you consider unions are a relatively recent phenomenon in world history and look at how hard big business tried to keep them from ever existing in the first place it's not surprising that they try to disband unions or at least prevent more workers from joining them. It's like how teachers aren't allowed to collectively strike legally, because God forbid they get paid more for what is essentially one of the most important jobs in society. But hey, athletes need those millions for playing recreational sports for a living.