The rest get fed to global capitalism in one way or another, the ways varying, but the outcome being pretty consistent: they're broke, they're in debt, and despite oftentimes being quite rich in resources, remain both of those things.
And if you think you're safe in the middle class, it was predicted that and would seem to be bearing out as correct that once capitalism has largely completed exploiting the underclass, it can't simply stop exploiting. The next class up becomes the underclass. Then the next. Then the next until we're all broke save for the rich on top, at which point the entire arrangement stalls, money stops flowing, and the system collapses into anarchy.
The project of neoliberalism is difficult to fully articulate, but a major component at least is the "taming" of capitalist economic systems so as to make them sustainable. This project succeeded for a good amount of time, but that was also predicated on having nations to exploit, and room to grow markets. As those things become less true the entire system seems less stable overall. I mean personally I've witnessed three "once in a lifetime" economic crashes so far, and we're looking to be winding up for another one with the incoming administration and their bonkers non-understanding of tariffs.
The solutions here aren't arcane magic or anything: Money needs to leave the rich, and get to the working class to re-stabilize consumer habits. But since the Reagan era's slashing of all manner of corporate regulations, the system seems either incapable or unwilling to let that happen, no matter how much of an imminent threat it presents to that system. So we go on and circle the drain.
That was a temporary blip because the underclass had been temporarily exported to a bombed-out Europe that was unable to meet its production needs, giving the US a huge market and very little manufacturing competition. Then came the Nixon shock, stagflation, and Reagan.
With increased financializarion and abstraction of tradable assets - the capital class no longer has to worry about "goods" or "customers" (in as much as they may be indicators of bad stocks with a dim future). Services are the future: as far as they are concerned, the amount of profits available in housing or healthcare may be infinite, of you need the chart to go up, increase the price of the cancer drugs in your portfolio.
It truly is, too.
I do appreciate the tropes of "It is the year 4,000 BC, and you are immortal, the pyramids are being built. You make $10,000 a day, tax-free, and spend none of it..."
But even that is hard to digest.
I'm in my mid-40s. If I tell my friends, "Someone gave you a million dollars a day, every single day since you've been born. And yet, there are multiple people out there with ten times more money than you," it becomes more digestible.
And still just as unconscionable.
The underclass? Or the WHITE MALE underclass?
https://fred.stlouisfed.org/graph/?g=cWvT
Also, 25% of homes in 1950 didn't have indoor toilets. It was very much not modern quality housing.
Note, more households in the US own their home now than they did in 1984. (I don't have numbers on this one back to the 50s.)
https://fred.stlouisfed.org/series/USHOWN
Fear about this is possibly suppressed memories of the 2008 recession, which was really bad!
And, that's assuming that the neighborhood in question didn't get bulldozed for a freeway by Robert Moses or any of the dozens of urban planners that used eminent domain to rat fuck minority homeowners out of the meager scraps they had managed to acquire.
And, that's only racial minorities, that's not even going into women who thanks to being largely un-banked and the presumptions that finance was simply over their pretty little heads, and of course that their jobs were chronically underpaid if they even could get them, would be laughed out of a bank entirely if they tried to buy a home.
So like, was it ONLY white men buying homes? Nah. But it was predominantly white men buying all the homes you would actually want to buy and if you weren't a white man, you had an objectively, measurable harder time doing it.