If humans behaved the way you desribe over the millennia, they would have wiped themselves off the face of the planet. Some did indeed, like romans, ancient greeks.. Even their languages are dead.One of the things in how nature works is that it only takes what it needs to survive. A plant or tree will only take nutrients from the soil in order to grow. A lion will only kill the prey it needs to survive. Man is the only one in that chain that takes more than is needed to survive. Humans horde, be it property, possessions, or natural resources and that upsets the balance of nature. Burning of fossil fuels is a classic example of how an abundant resource is abused to upset the balance somewhere else in the worse possible way, CLIMATE! Which is all powerful & unforgiving, it is what we need for our very survival. Yet the ignorant choose to ignore the warnings. Despite Science giving us the answers to interact with nature in far less threatening way.
The same will happen in the coming decades. The spenders will spend themselves away to the grave.. They can't be the survivors naturally.