[1] To be clear, I very much view this as a failure given how much richer the US has become in the same period. Nevertheless, it is not true (or at least not clear) that the portion of people who are able to actualize their potential is falling.
The poverty line for a family of four is defined as a household income of $26,200. Any reasonable person knows it's impossible to pay rent and feed and clothe two adults and two kids on less than $2200 a month. Nevermind owning a home, having a car, saving for emergencies or retiring. Yet the U.S. government does not consider that to be poverty. From Wikipedia:
https://en.wikipedia.org/wiki/Poverty_threshold#Cutoff_issue...
> Most experts and the public agree that the official poverty line in the United States is substantially lower than the actual cost of basic needs. In particular, a 2017 Urban Institute study found that 61% of non-elderly adults earning between 100–200% of the poverty line reported at least one material hardship, not significantly different from those below the poverty line. The cause of the discrepancy is believed to be an outdated model of spending patterns based on actual spending in the year 1955; the number and proportion of material needs has risen substantially since then.
The reality is that poverty in the U.S. is increasing. It has been for decades.
Step outside of your bubble. This is very feasible in low CoL areas all over the US. And remember that’s the line so it’s going to be difficult, but it can be done.
There's a graph in TFA showing that, after adjusting for inflation, the per-individual wealth of the middle and lower classes decreased by 20% and 45% respectively between 2001 and 2016. The individual wealth of the upper class increased by 33% in this time period.