That seems a bit familiar to me. Did the book make an analogy between the Wizard of Oz book and gold and primarily deal with debt?
EDIT to add: Some Googling, and this is the book I was thinking of: http://www.webofdebt.com/excerpts/chapter-1.php
EDIT to add: Some Googling, and this is the book I was thinking of: http://www.webofdebt.com/excerpts/chapter-1.php