It's those kind of pay schemes that make me question why your typical corporate worker isn't embracing Unionism. They aren't being paid according to their production or worth, just within an arbitrary range. No different than all Package drivers getting the same pay in my book, but without the protections of a Union contract or guaranteed progression.
Except management gets fired for lack of meeting goals or in some cases, meeting goals but meeting them not as well as others in your group.
A management person can be found as "needs improvement", even when they meet every goal, if others did even better.
Half of the management people you see "needs improvement" even if they are doing a good job.
If a management person is performing well, they can max out or even get promoted or moved to a higher grade.
Most other companies do not classify professional or skilled labor as management like UPS does.
UPS likes to classify people as management even if they do not materially make decisions in the running of the company because it provides flexibility and accountability.
Pretty much impossible to organize and the vast majority would not be interested.
"Management-type" people in the US are expected to work for 6 or 7 companies in their career. UPS is in the process of migrating to this model.