I believe the real evil is in the conceit of knowledge, and that the gross inequalities of material wealth are actually only symptoms of this.
Roughly 2,500 years ago two giants of ethical philosophy appeared on the scene in the form of Socrates (who can be learned about best through Plato's dialogues and Xenophon's underappreciated Socratic works) and Siddartha Guatama (I would recommend Thich Nhat Hanh's Old Path White Clouds as a reasonably unified source of his life and thought).
I know bringing those guys up probably seems sentimental, but I have lived experience with poverty, and political "realism" is only beneficial to those who have not as yet suffered the consequences of harmful patterns of behavior.
I think Charles Dickens' A Christmas Carol illustrates a pretty good path for the exceedingly wealthy to become heroes, but there's this problem of sentiment, isn't there? And yet sentiment is constantly appealed to in all forms of commercial advertising!
People don't even know why or how they are here. Siddartha and Socrates' responses were basically that the answers are difficult to articulate or fathom, but the real pressing issue is how best to live life, and their answers were basically to moderate and do no harm or wrong, at least as much as possible, because the real goods are non-material, and to do wrong actually harms the perpetrator more than the victim.