Union leaders are elected by their current members. The current members want to create labor scarcity to inflate their own wages. Unions, just like industry ass

Union leaders are elected by their current members. The current members want to create labor scarcity to inflate their own wages. Unions, just like industry associations and all other types of guilds, have a natural incentive to raise the barrier to entry. That isn't to say unions are bad necessarily. They have plenty of upsides as well. But it's important to recognize flawed incentives where they exist.