I think it is a interesting question. Before using a payment gateway, what is the cost of using cash? It would be covered by tax. If the whole society is abando

I think it is a interesting question. Before using a payment gateway, what is the cost of using cash? It would be covered by tax. If the whole society is abandoning cash, it is effectively meant raising sales tax by X%, where X is transaction cost of each payment. A cashless country should just use the tax money on cash printing factories to cover the cost of transaction.