To my eyes, your statement seems to be completely false.
http://archive.fortune.com/magazines/fortune/fortune500_arch...
1998, 2017: 1) GM, Walmart 2) Ford, Berkshire Hathaway 3) Exxon, Apple 4) Walmart, Exxon 5) GE, McKesson 6) IBM, United health 7) Chrysler, CVS 8) Mobil, GM 9) Altria, ATT 10) ATT, Ford
Wow, outstanding ! As you can see there are a number of companies that are new, dropped lower ranking, moved up in ranking, and completely disappeared.
We could keep going even further back a decade and the changes will be more visible. There’s a few companies who are entirely gone from the top 10, and I can guarantee that none of them wanted that outcome.
So to you, I say, got any more nitpickings?
You could have a contrived round robin system where 100% of people eventually end up with 100% of the wealth.
For another simple example, look at the Fortune 500 of today vs 20 years ago. Very few companies remain, it’s still very much fluid.