Here's a fun video which discusses the phenomenon you're describing. Its a bit click-baity but does provide an overall summary pretty nicely. Economics Explai

Here's a fun video which discusses the phenomenon you're describing. Its a bit click-baity but does provide an overall summary pretty nicely. Economics Explained - The Ranks of Global Billionaires: Not All Billionaires Are Made Equal: https://www.youtube.com/watch?v=0MeRN7LE1LQ https://www.youtube.com/watch?v=0MeRN7LE1LQ It even covers the oligarchy scenario :)