Well, the cold machine of capital has no use for what it deems to be unproductive populations. Those groups are to be policed. With climate collapse you have strains of thought who tend towards the idea that 'humans are the real plague', which serves to mask the reality that when the cookie crumbles and billions die they won't be billions who live in the Champs Elysee or Martha's Vineyard. Ecofascists outright see death as the solution to industrialized climate change.

What happens instead when the 'pie' shrinks in a militarized police state? The same thing that's happened for the past 40 years. People are blamed for their choices, told to learn to code, told to seek services that haven't been provided since before Reagan became a vegetable. Except that with the loss of the USD what was once the slow boil of financialization becomes a steep cliff. People who had otherwise been well off suddenly find out that their house isn't worth much and neither is their assets or their money. Taxes go up to meet investor expectations as bond yields rise. Interest rates must be kept high at all times, because the country no longer has an aura of unbroken credibility. In short, Argentinification where every solution possible to the economic woes of the country takes so long to take effect that by the time the next president is in power everything is worse.

The United States has all the capital in the world to steer that ship away from the rocks. It has chosen not to for 40 years because there's simply too much money in exploiting reserve currency status. Now they are threatening that status by sanctioning countries that are too big to ignore. Soon they might even sanction China, but Brazil, India, Russia and so on are all sanctioned already. What happens when the only people recycling dollars and sending their profits to the US are moribund in Japan and the EU?