Well there is one problem with ya'lls theory........some people just never get fast enough to move out of the amateurs.
Look at my class. Most of us are no where near the intermediates. I finished 2nd this season. Should I be bumped? Believe me if I was ever fast enough to stay in the same zip code as the intermediates I wouldn't wait to be bumped. I would just move myself.
Gary 415w has been in that class for the last 4 years and he got his best finish ever last race with a 7th.
Some people can come into the class and be running in the next level by mid season. Some of us will be carrer amateurs.
The only way to do bumps is by lap times. If a person runs lap times that are compariable to the next level then they need to be bumped.
Now you do get the occasional sand bagger who just races the class because they know it will be an easy win. Actually that happens more often than not. That's not really winning is it?