On the to-do list of the progressives setting out the steps needed to perfect the world, right at the top we find “Get Rid of Cash.” That makes total sense. Use of cash for financial transactions is the source and enabler of human sin and failing almost without limit. Our free exchange (aka “capitalist”) system gives rise to endless varieties of undesirable activities, ranging from the criminal to the sketchy to the non-virtuous to the icky. If only we had a world without cash, all transactions could be forced onto electronic payment systems where they could be continuously monitored by...