What the Government and Federal Bank (RBI) in India is emphasizing is not the "cashless" economy but the "lesscash" economy. We cannot totally avoid paper currency and shift to digital currency as it may cause lot of hardship to "mom's" and many others and at the same time empowering the vested interests to exploit as explained by Ron. Oversupply of paper money has its own ill effects like black money, fake currency, tax evasion, terror funding and other activities which encourages parallel economy.