How many amplifier companies actually enable their factory workers to negotiate individually effectively in ways that they couldn't with a union? Why couldn't a

How many amplifier companies actually enable their factory workers to negotiate individually effectively in ways that they couldn't with a union? Why couldn't a union negotiate terms that guarantee pay for performance in the way you want? In software, people often complain about doing the work of a certain level but not being able to be paid at that level. Union contracts could mean a seat at the table on promotion decisions. And sure, there will probably be some people who are in unusual positions where they can negotiate more effectively by themselves. Similarly, there are people who would improve their status in the United States if we had a Putin-esque autocracy. Even if someone personally benefits from this scheme, I consider it to be pretty bad for uber wealthy individuals to sabotage our democracy so that they maximally increase their wealth.