There is no such thing as no ruling class, and generally, anyone who sells you that is aiming to become the ruling class themselves. In the best case scenario, they want to be a benevolent dictator, and we might have seen a few people get close to that over the course of history but no benevolent dictatorship lasts longer than two generations and many fail even sooner than that. In the worst case, they are just riding on this political train and aim to be a not so benevolent dictator themselves.

Any system that does not account for human nature and build an incentive structure that guarantees the maximum possible equality/equity while assuming everyone involved is selfish is a system that's ill suited for humanity. And if you force an ill-suited system, someone will inevitably swoop in and use it for their personal gains. Like as bad as our current system is with wealth inequality, the soviet system had an even slimmer and richer elite, they just hid it well.

I agree with all of your goals, but we need to do this the smart way, and that involves setting the priority exactly as your list goes and actually accounting for how people behave. The result might not be perfect, but we can do better than we do currently, I think that should be the goal rather than going for perfection and falling for snake oil on the way.