Usury didn’t fail. Usury worked exactly how our Founding Fathers and Scripture predicted that it would. It worked exactly how the jew banksters designed it to work. OUR system is free enterprise, not usury, and free enterprise DOES work. Usury is still a crime in most of the current creditor nations, like the Arab nations and Japan and China.
ps–we should note that OUR Scripture requires the DEATH PENALTY for all who practice usury.
Ezekiel 18:13 He lends at usury and takes excessive interest. Will such a man live? He will not! Because he has done all these detestable things, he will surely be put to death and his blood will be on his own head.