Money is interest-bearing debt lent into existence.  Nothing backs it except for more interest-bearing money made by lending it into existence.  Total cost–salaries, wages, dividends–is always less than total purchasing power.   There is never enough money to pay off the principal plus interest.  Slavery is built into usury just as an oak tree is implicit in an acorn.  Those Occupiers who push the left-right dialectic are ambassadors representing Geryon.