The biggest problem that nobody talks about and the reason most collapses (or rather revolutions) happened was the grow to top layer of ruling class. Those who dont do anything but extract rents (as in get money for doing nothing).

They siphon wealth from middle class, who has less and less wealth to sustain itself and prop up poor.

The finance sector is not helping either as it generally doesnt create anything either + markets and ever more abstracted tools that create usless 'middle man' that again siphon wealth without creating anything.

And on top of that you have corporate media that are doing everything to prevent class war, by creating cultural and propagating wars.

This is putting immense strain on middle class who are tasked with pushing the wheels of the system, with less and less each year.