Unions are worker associations, aren't they? So it's up for the members of the union to decide what they want. My, non US, union has different tracks for management and experts (so no problem to move up or change tracks), has a solid base pay but the company is encouraged to pay more than that. For the real rockstar employees there is there option to get paid well above union, then their rules can be mostly ignored (because you're earning a shitton of money as compensation)
Oh, and for a part of hard and dangerous work they're currently fighting for 4 days at full pay.
Not getting unionized is like going to war alone because you don't like the uniforms colour...
On a grand scale: That's what states are for. On a personal scale: If states let people go hungry, don't make their life harder than it already is, don't be an asshole.