I call it the triangular Holly Grail of Western economics. That is : limited resources, unlimited human demands, and interest rate. That is where the issue of moral economy stems from.
The 2 assumptions are negated. The tool of wich to control, which is interest rate, is the best way to create a maldistribution of resources and income.
The result, is an economic system without equilibrium reaching a critical stage to burst and collapse.
With all due respect i have no idea what Augustine has to do with this. Is morality a monopoly for the history or whatevet. Although, i appluase him for fighting the usury. Which is the critical point.
Change the first 2 assumption. Then create a free capitalistic economy that is based on partneship not lending money.