Earlier quoted context omitted.
Seemed like a dubious claim, so tried to find a source and found this old article: Did the Forbes 400 Billionaires Really 'Build That'? https://www.cnbc.com/id/49167533 Trimming a lot: "United for a Fair Economy breaks down the Forbes list using a baseball analogy. It says - 35 percent of the list was born in the “batter’s box,” with a lower-middle class or middle-class background... - 22 percent of the list were bor…
35% of the top 400 came from poverty? That’s actually much higher than I thought it would be and pretty dam remarkable. At least in the US, less than 35% of the population actually lives in poverty.
Those 35% are (lower) middle class. Apparently none of the top 400 billionaires came from poverty.