I wonder how you could make a capitalist system truly fair. Where those who bring the best ideas and create the most value rise to the top over their lifetime.
Maybe aiming for equality of upbringing in all years pre-18/21. 100% estate taxes, we all start from €0. With socialised amenities as well as housing & education.
Although, I think, when you factor in overcoming social issues like race & gender it would become a never-ending challenge.