In this paper we emphasize the interrelation of the monetary, free-enterprise sector of the economy and its maintaining basis. The current discussion on sustainability has so far placed too little attention on this circumstance. To us this interrelation is fundamental; it is one important key to understanding present day economics and economies. By concentrating on this interrelation we question the widely accepted dualism between the public and the private, between the officially acknowledged economic and the invisible economic. By this we create our own specific approach to the question of how to reform economic thought and action in order to achieve a naturally and socially sustainable living.