The “supporting data” are averages though, which are the fake news of statistics, so I suspect it’s more to do with the richest 5% of the population owning the vast majority of the assets (stock, housing, etc).
Zuckerberg’s wealth increased from 55 to 177 BILLION since 2020. If there are 100 million adults under 40 in the US, his growth alone represents $2,440 for every one of them. All you need to do is extrapolate the growth of the richest 1-5% assets and the bottom 95-99% are well behind where they were in 2020.
Remember! The corporatocracy-owned media exists to make you believe dystopia and poverty is actually freedom and prosperity.