Coincidentally, this new infrastructure bill has union requirements for any EV work.
Not that everything in Europe is sweetness and light with unions, but they are more widely accepted. That leaves more room for amicable rule-making and flexibility.
The anti-union forces in the US, of course, put all of the blame for that on the unions -- which is exactly the kind of hostility that makes it difficult for the unions to negotiate flexible, reasonable contracts.
Others are more like European unions thus are more reasonable. In the limited times I've worked with IEW union electricians in the bay area they were reasonable people who did good work without any slacking, fake make-work, or outrageous prices.
I'm older now, and arguably a smidgen wiser. I've reacted with shock at hearing about old acquaintances who have been killed on the job or now endure chronic pain and are no longer able to work. Broken backs, bum knees, busted nerves, missing fingers, the list goes on. The plodding, methodical 55 year-old union guy is looking less and less silly the older I get.
In short, perhaps one reason a union might push back against performance-based bonuses is that it often ends up coming at a long-term cost to the worker that is difficult to foresee when you're an invincible 25 year-old trying to make a few extra bucks for the weekend.
Perhaps another argument for the plodding, methodical 55 year-old union guy's way of working?
In fact the incentive of the union is shoddier work so they have more work to do late to replace it.
I really don't know the ratio, but in my highly incomplete experience it was about 50/50..
This is purely conjecture, but the real problem to me SEEMS to be the union management. Unions are super useful sometimes, but like any concentration of power, they get corrupt over time.
I feel people forget that unions are organizations, and like all organizations (companies, non-profits, religious orgs, etc), they can be good or bad.