The only monetary system that squares itself with Catholic morality is an honest, 100% reserve standard, which historically has proven itself to be based on silver or gold. Any system that represents to owners that they have full ownership of their money, when in fact they are only part owners of a going-concern which unbeknownst to them is easily on the verge bankruptcy in the case of bank deposits, or that they hold certificates to real ownership that can be duplicated ad infinitum by the governing authority so as to render the original holder of the certificates unable to exercise the intended wealth-preserving effect, as in the case of paper money, is immoral, contrary to the natural law, irreconcilable with Church doctrine and the long history of Catholic economic thought, and Satanic in origin.
For all of the real economists out there, it is now clear we have an apparent holder of Papal office that does not intend what the Church intends and does not teach what the Church teaches. Francis is calling for a new world central bank that perpetuates, emboldens and institutionalizes the dishonest fractional reserve system currently in place.
Let us hope that just as Pope Francis is wrong about the appropriateness of walls as national boundaries and Trump is right, that Trump also takes the right side of this issue. If we see that Trump too calls for this new world currency led by the World Bank in the form of an SDR or other supranational currency, we will know that the entire Trump phenomenon had ulterior motives from the beginning.