[mcv]

Extreme inequality does not benefit society. It's a sign that people aren't able to improve their lot, at least not without access to money. In a society where the poor can realistically improve their lot, you don't get people stuck in poverty.

Of course finding a gold nugget doesn't hurt society, but if you own the ground on which other people find gold nuggets, and that means they have to give half of their gold nuggets to you, then they benefit less from their luck, while you benefit from other people's luck. That's how you get extreme inequality.

Of course there's always going to be some inequality. Perfect equality is not something that's realistically possible or desirable, but taken to extremes, it does become harmful.