Don't most jobs have a range set by the company? Something like between 80/120k based on experience. A union wouldn't change that. I've never seen someone go in with 10x skills at 150k and make it past the recruitor filter.
The number of places that will pay you more than they decided beforehand is very small not matter if you are 10x better or not. You will get top of pay range.
Startups wouldn't fall under this because usually you need 20+ people. This would apply to get giants who have systems in place. If you are truly worldclass they invent a position. But for regular developers where there are more than one person sharing the same title this is who the union is for.
The number of places that will pay you more than they decided beforehand is very small not matter if you are 10x better or not. You will get top of pay range.
Startups wouldn't fall under this because usually you need 20+ people. This would apply to get giants who have systems in place. If you are truly worldclass they invent a position. But for regular developers where there are more than one person sharing the same title this is who the union is for.