A Wall Street Journal news writer wrote about the accumulation of additional wealth by the already wealthiest in the United States.

New data suggest $1 trillion of wealth was created for the 19 richest American households alone in 2024. …
It took four decades for the top 0.00001% of Americans share of total US household wealth to grow from 0.1% in 1982—when 11 households made up that rarefied group—to 1.2% in 2023, according to an analysis by Gabriel Zucman, an economist at the University of California, Berkeley and the Paris School of Economics.

What’s missing is any discussion of economic mobility, which always has been at the center of our nation’s economic development and overall wealth increase. Who are these households, and who were they?

Those in Zucman’s research on the top 0.00001% in the US are worth at least $45 billion per household and include Elon Musk, Jeff Bezos, Mark Zuckerberg, Bill Gates, Warren Buffett, and private-equity investor Stephen Schwarzman.

All of these, with the possible exception of Buffett, are Johnny-come-latelies to this tier—that’s upward mobility, and part of that eight household increase.

JPMorgan Chase’s private bank estimates US billionaires numbered nearly 2,000 last year, up from about 1,400 in 2021, when it began tracking billionaires. Wealth-data firm Altrata, meanwhile, estimates the figure at 1,050 billionaires in 2023, the most recent year for which it has data, up from 975 in 2021.

There’s a hint there. General wealth is increasing and individual folks and households move up the economic ladder. With mathematical certainty, others move down: even with a growing population—and ours is only barely growing—0.00001%, 0.01%, 50% of our population are finite numbers, and while more are rising than falling, some still must be moving down.

That’s economic mobility. And this: even as wealth is getting concentrated, it’s getting concentrated in an ever-increasing number of households.

It’s good to be rich. It’s even better to live in a free market economy where any of us can get there. After all, it’s not the concentration of wealth that matters so much, it’s the ability of any of us to accumulate that wealth and move up the economic ladder in the first place that’s important.