Colonies were good for society.
Kings and Feudal Lords were good for society.
It's not a static world. Things change.
Those who benefit at the expense of others, get trapped into making up elaborate stories to justify their choices. Unfortunately making up stories, doesn't reduce the number of people who are paying some price or the other. Once that pool grows large enough, we see change. So Slavery got abolished, Colonies got abolished, and most Kings and Queens have been reduced to Tourist Attraction. Its up to the Tech Monopolists, for the sake of their own survival, to pay attention to the growing rumblings.