The best example of a sustainable economic system is the one deployed by nature, the system we as humans (and all known flora and fauna) are subjugated. A proxy of sustainability achieved by the renewability of its resources. The methods of renewability quite different from the destructive suppositions of sustainability used in the marketing spin of cheap karma.
Hence, in order for humans to evolve to the best of our ability we must subjugate to the rules of nature’s renewal, principles quite different from the ones we have deployed in our current operating-systems of humanity (i.e. financial systems, economic systems, education systems, political systems etc.) and the reason why we must reinvent the very systems that guide the evolutionary excellence of humanity.