this is a good piece in the Grauniad:
…Could we see a whole city go cash-free? From Seoul to Bergamo, cities big and small are at the forefront of a global drive to go digital. Many of us are happy to tap cards or phones to hop on a bus, buy a coffee or pay for groceries, but it raises the prospect of a time we no longer carry any cash at all.
No spare change for the busker at the station, the person sleeping rough in need of a hot drink, the market trader, the donation box. Although even on-street charity fundraisers are now broaching the world of contactless payments, what might the rise of the cashless city mean for street vendors, small merchants and the poorest inhabitants?