I imagine the end goal for a utopia is to have 0% of economic and social discrimination.
Social Discrimination solved:
100% homogenous society, if history has taught us anything, it is that once a society is completely identical, the people then begin to discriminate between each other economically. (It is also much easier to solve economic discrimination) This can be shown through the toppling of Monarchies in Japan and France, the people were all the same, so the only thing left to discriminate towards was wealth and comfort. I am not advocating for communism because it doesn't work. I also believe a class society with a social hierarchy is both inevitable because humans will always from one when in a society.
Economic discrimination solved:
Being able to subsidize and loan to support the middle-class
Free movement between economic status
And assuming in this society business owners rationally spend their money, fewer taxes to allow for more growth. While encouraging investment back into the company and in turn the labor force.
Please, critique others societies and present your own.