While your solution would work, it doesn’t resolve the Zippay merchant fees which are imposed on the retailer and then which the retailer chooses to impose in its customer(s). It would be better for the merchant fees to be addressed, so that the impacts on the end consumer(s) are minimised.
I can’t imagine that Zippay costs for processing the purchase are around 2-4% (or the retailer’s costs being 7%) when the rest of the credit industry are <2%.
