I don't see why income inequality is inherently "evil". Yes, too much can be a problem, although I'd be more concerned with the overall standard of living than whether billionaires exist. Is it evil that some artists or athletes become extremely popular? Is it evil that someone's business becomes extremely successful? Do either of those things lower the standard of living for other people? I tend to think they grow the economic pie and provide goods and services which didn't exist to the same extent before.

This isn't to say there are no problems with income inequality, or that there shouldn't be proper safety nets or taxation, just that income inequality doesn't seem to be an evil in my judgement. Some people are just going to end up more successful than others for whatever reasons, and as long as it's done within the law, I don't see the inherent problem with it. I do see a big problem with trying to make economic outcomes equal, and I don't think it works.