My suggestion in the book is to go back to a distinction between "needs" and "wants." A distinction that capitalism has unfortunately erased. For a great treatment of that I recommend "How Much is Enough" by Edward and Robert Skidelsky. Here is my take on Needs (caveat: this section of the book is heavily under development, so YMMV) https://worldaftercapital.gitbooks.io/worldaftercapital/cont...