I don’t think there is anything wrong with multi millionaires because that is a realistic amount you can earn without abusing others.
A surgeon on $500k a year will be a multi millionaire by mid 40s. Why would he finish school at 18, do a medical degree (4-6years), then surgical training for another 4 years and then 2+ years of training in a clinical setting (or hospital) if they have no chance of making better money in the future?
They’re spending an extra 10 years studying and amassing a large amount of debt for the CHANCE to get a high paying job. He’s probably still in debt at 35.
You take out any incentive for people to thrive and you’re going to have a pathetic community pretty quickly.