Yes a postal savings system would be a way to provide a government run electronic payments system. The point is that there are many benefits for businesses to

Yes a postal savings system would be a way to provide a government run electronic payments system. The point is that there are many benefits for businesses to not accepting cash payments, especially if they're maintaining the service for a decreasing portion of their customers. Also, if customers had access to a government run cashless payment system (the same privilege that private banks enjoy) then they might find themselves less interested in carrying cash in the first place.