This essay uses a weak straw-man: the only way to become a billionaire is by exploiting people I think the "principle of charity" or "steel-man" criticism of billionaires isn't that every single billionaire is directly exploiting people. It would be closer to something like this: The problem is that our society has feedback loops that make it hard to escape poverty, and feedback loops that let the wealthy amass more…
I don't think any of your three statements are true, based on my (limited) knowledge of history. Far as I know, the only way to break the feedback loop is to restart it - a revolution or the like - and build something in its place that maximizes the time until the loop has to be broken again.
If anything, I'd guess that it's human nature to try and amass power/money/influence/cows, and the more you have the easier it is to get more. That's not a fault with our laws, it's what people do - on average, in aggregate.