It is not at all hard to make a fair economic system; I am doing just that with my invention of my new operating-system of humanity, soon to be published.
But the adoption of fairness requires recognition of freedom as dynamic relativity theory, rather than freedom as absolutism controlled by a stale oligarchy. And that means we must have respect for freedom to each his own, which is hard for most people who have spent their lives amassing their sense of security (money) in the deep dark catacombs of a denial of freedom to others.
Change is hard for people whose livelihood depends on the unchanged. But change we must, if we want to improve the quality of our lives to prolong the sustainability of humanity.