Not a situation anyone is considering and you're ignoring my last sentence.
Not per household, per person.
Assuming everyone would away their windfall in your hypothetical scenario is a stretch, even if many might.
And the formerly rich wouldn't be paupers, they'd have $38k, and whatever know how they had before.
Infrastructure, means of production, and businesses wouldn't vanish, even if the capital and control behind them became dramatically more widely distributed.
Poor people buy goods and services all the time, and proportionally more of their money flows up than the other way around. Employment doesn't just go one way. Jeff Bezos doesn't serve people richer than himself...there aren't any such people. He makes his living and grows his company by profiteering off the labor of paupers while helping to make sure they also pick up more of taxation and other financial burdens that would otherwise eat into his bottom line. In a very real sense, I employ Jeff Bezos, as do tens of millions of other people. His position doesn't make him necessary though, if he dropped dead today, Amazon would do fine without him.
Indeed, without any radical changes to the underlying systems, this would happen to a significant degree. There would be massive and probably rapid reconsolidation, though not all the same people would rise to the top again...plenty of people of wealth and power, quite probably the majority, who inherited what they have or the opportunity to build it, rather than earning it themselves.