No matter how you set up your society, there are going to be some sorts of people who are better at running their lives in such a society, and they will naturally prosper more than those who do not possess their talents. There’s no way out of this reality; it’s like gravity.
Nor is it a problem that some people are bound to do better than others, and thus to wield more social power than others, any more than gravity is a problem. Indeed, it is one of the bases of social order, as gravity is a basis of causal order.
While differentials of prosperity are not inherently problematic, the way that people are sorted into greater or lesser prosperity may well be. The justice and goodness of the distribution of wealth in society depends crucially on how prosperity is generally achieved in the sort of society you have set up. If you set up your society so that the way to prosperity is by being a brutal gangster, you are going to have a lot of really expert brutal gangsters, and a lot of people trying their best to be brutal gangsters. If on the other hand you set things up so that the best way to be prosperous is to be beautiful and athletically talented, then you are going to have a lot of rich beautiful athletes around, and a lot of people trying to be beautiful athletes. If you make it so that prosperity is achieved by personal rectitude and enterprise, then you’ll have a lot of people trying to be virtuous and enterprising. And so forth.