Collapse of a young population causing a 1:1 worker retiree ratio. At that point the old get pushed off bridges.
I'm guessing whatever the poster has in mind it'll have some Godwin's Law style implications :)
A slow unraveling of the accumulated wealth of billionaires and corporations. Catch the falling knife with your strong hand. Be even better if the rich did it voluntarily.
Wealth destroyed this way just disappears, it's gone. As we saw after the communist revolutions in Russia and China, which led to decades of extreme poverty and tens of millions of people starving to death. There's not a single case in history where the state mass appropriating assets from the rich improved the people's standard of living; the only people whose standard of living improved was the cadres who now controlled all the nation's wealth.
That's not what I'm proposing. Billionaires give away their money all the time.