I'm not a political and social science think tank, so I cannot propose anything. I doubt there is one method or approach to just establish this.

That's fine, I am more asking a question to get you to think about method as well. Lots of people agree on goals, but methods of getting there are diverse, and many of them are fantasy, which makes the goals pointless.

I mean I could tell you that I would "just" pay everyone basically the same

People have unequal abilities and unequal needs. People shouldn't be paid the same, the whole of production should be in service of fulfilling the needs of the whole of society.

have "free" housing standardized for everyone and have them relocate to not further than 15 mins from their work, demolish single family houses, have students paid for studying, have parents paid for parenting, provide "free" necessities and basic foods, and get rid of bullshit jobs and companies that make products for empty consumption. But I mean, "just". That's obviously a thought experiment that happens by a complete layman and I doubt that I could win people for this, let alone in a democratic way.

You'll find that many people agree with you on this, but if you can't achieve this electorally, your option becomes Revolutionary in nature.