Capatialism the Free Market & Christianity

With the reaction of many of the right wing talk-bobble-heads to this past weeks comments by Pope Francis has brought to the forefront a question I’ve been asking for several years now.  I’ve been asking various and  people I know who make a point of pointing out that they are Christians just where in either the scriptures or other Christian teaching (or Philosophy) that Usury is no longer a sin in their denomination? I should like to point out that even in the link on Usury in Wikipedia talks about unethical or immoral monetary loans and not just making loans for money.

Other than a couple of very very strict Calvinists who equate being successful as the same as being one of the Elect, I have yet to get any citations or references.  Strange.