https://accountinginsights.org/what-is-a-parallel-economy-an...

> What we do see are troubling signs that low- and middle-income consumers are fading in the economic data. The top 10% of earners now account for about half of consumer spending, the highest share since at least 1989, according to an analysis by Moody’s Analytics. The top earners’ share of spending has trended higher since the early 1990s from a low of 35%, matching a rise in income inequality over the same time. Meanwhile, the bottom 60% of wage earners account for less than a fifth of consumption, down from more than 26% three decades ago.

Having such a large portion of the population not matter anymore, from an economic standpoint, doesn't seem... sustainable.

Obligatory Manna link