In normal circumstances which applied to most public population, a 50/50 split of shares is fair.
But Jeff Bezos doesn't belong to a normally distributed population, his is an outlier case statistically, with Amazon being an extremely important asset that not only affects their personal lives, but also has enormous impacts and responsibility to the public.
Jeff Bezo's personality and leadership are crucial for the organization. You can't apply the same principles to his case vs. the majority of public.
The key to being effective is the ability to recognize the differences in special circumstances, and knowing how to be flexible so you can adapt to those situations. I can tell it's not easy for most people.
One of the biggest problems today is most people only perceive the world as either black or white, and there are no "in-between", or "grey-zones", or "outliers". But the real world in our lives has never worked like that. This viewpoint is producing a lot of narcissists and their "you are either with me or against me" attitude, which subsequently contributing to a lot of hatreds around us.
Emotionally intelligent people are the ones who truly understand the meaning of the word "compromise", in order to produce a win-win result. That's what separates them from the rest.