The status quo measures wealth with “money,” but “money” is not what’s valuable. “Money” (in quotes because the global economy operates on intrinsically valueless fiat currencies being “money”) is wealth only if it can purchase what’s actually valuable.
As the world slides into an era of scarcities, what will matter more than “money” are the essentials of survival: fresh water, energy, soil and the output of those three, food. The ability to secure these resources will separate nations that fail and those that survive.
In a world of abundance, it’s assumed every essential resource can be bought on the open market. Surpluses are placed on the market and anyone with “money” can buy the surplus.
Things work differently in scarcity: “money” buys zip, zero, nada because nobody with what’s scarce can afford to give it away for “money” which can no longer secure what’s scarce.
Parachute into a desert with gold, dollars, euros, yen and yuan, and since there’s nothing to buy, all your money is worthless. Once you’re thirsting to death, you’d give all your money away for a liter of fresh water. But why would anyone who needs that liter for their on survival trade it for useless “money”?
Imagine the longevity of a regime which sold the nation’s food while its populace went hungry. Not very long once the truth comes out.