Gregory's Server
Of the various abominations and absurdities of text book and orthodox economics is the use of interest as a way to control economy.
Usury, as I prefer to use the term, is wealth distribution. It diverts income from labor, up thru business and into the creditor class. It is also inflation and austerity. Inflation from those who can raise prices and austerity from those who cannot.
Usury, profit and the belief human existence can revolve around it is a millennia old social cancer.