If you have a $100 bill and you spend it at the local takeaway and that person spends it on groceries and then that person spends it on new shoes, the $100 bill is still $100. But if you pay with card, the bank takes 1.5% then another 1.5% and then another 1.5%. After 20 or 30 transactions, the only ones left with the full $100 are the banks.That's why they want to get rid of. ...