Wealth being the integration of gains - consumption over time makes it a poor metric for looking at society as a whole.
Something like 50% of Americans will be millionaires at some point in their lives—upper quintile per this chart, typically later in their earnings years. Almost all of them started “poor” as young adults, per this chart’s definition.
That being said, one accident or illness that strips away that doctor's ability to earn, leaving them in a soul crushing amount of debt that can't be discharged via bankruptcy. Their debt obligations are real.
Look at that last bar; consider just the annual yield or interest payment on that wealth; soon, it's going to be more than all other bars combined. If people understood the situation, they would all stop working and start making lists of who these people are and work for them. That's the only logical (legal) thing to do. Every other job or career is a waste of time.
Given that the Shiller P/E ratio is now 40 (under 3% of the value of the assets), the yield is actually a pretty small fraction of that last bar... but even then, I'm saying one year's yield could exceed the worth of all the others if things continue.
But IMO, it's already the case that the economy is centered around the free money/proceeds received by top 0.1%. This is why we saw all that nonsense with COVID, DEI, Wokeism, etc... This is what happens when a small number of elites decide to spend a bit of 'spare change' on politics and social activism. Imagine how bad it's going to get after that wealth has compounded in 10 years...
Clearly, the money printers. How else could there be such an enormous gap between those last two bars?