Quote from Arjun1:
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He said "there is nothing to look at" while it was has been addressed centuries ago . Actually it is not true. He just does not know about what was written about that problem, probably because his knowledge is limited to what he received in an economics/business school. The root problem is that money is given a cost, there is a dichotomy between borrowers and lenders, and banks earn from interest. Change the model to something like: (1) zero interest, (2) borrowers give cash/ lenders give sweat, and both are paid from profits, and (3) banks make money from actual work done to conduct financial services transactions, so a banker would become like other professionals where his earning is limited by the product of his effort and the value of one time unit of his effort (like in other businesses). When interest is zero, the banker cannot anymore use money leverage to earn.