William Jennings Bryan was what we call today a “money bug.” He believed that a certain change in the monetary system would be enough to bring prosperity to the vast majority and, at least, security to all. But, since money is merely a measure of value, we know full well that a mere change in its form would not add more value to that which it measures, any more than the shortening or lengthening of a yardstick would add length or quality to the cloth it measures.
This is the stumbling block of the majority of money reformers; they believe that a change in the measuring of value, a change in the money system, will bring about an alteration in the wealth it measures and changes in the possession of wealth.
…[N]o mere change in the means of measuring or medium of exchanging values will create new values or cause existing values to circulate more freely.
(John Keracher, Economics for Beginners, 1935, http://www.marxists.org/archive/keracher/1935/economics-for-beginners.htm)