This is brought up often as some kind of contrarian rebuttal to the politics around modern inequality. It used to be one of Paul Graham's favorite counter-arguments. It's still as boring now as it was then.
Conjuring up a convoluted thought experiment just to try to take the wind out of people arguing about income inequality isn't insightful. It doesn't add anything to the argument. Literally the best point you're making is that as long as human progress doesn't stall completely for a hundred years, we should all be happy.
Oh, and choosing Rockefeller is hilarious, given his status as an oft-criticized robber baron in the political discourse at the time. (I wish modern political cartoons were as sharp and well-drawn.)