yes, we call that inflation.
Purchasing power fluctuates based on "productivity gains, better coordination of capital, labour, and technology. " - China for one artificially keeps the RMB low in order to oversupply, yet they could and can tenfold their purchasing power. These are all systems.
Debt issuance does and has created growth, please stop being retarded. Maybe you don't understand what I am saying, or what a debt issuance (bond usually, but maybe a reserve asset, placement or other type) that earns a YIELD based of the "productivity gains, better coordination of capital, labour, and technology." of the locale.
What you have stated is factual to some degree, but fixed supply economics has always failed, historically since Babylon.