This is actually something I have spent a lot of time thinking about. In Sweden, where my boyfriend lives, their BankID app is ubiquitous, and there is very little cash handling going on, additionally the fees for actually going to the bank or subsidiary to pay your bills are exorbitant.
Everybody pays their bills online using "BankID", which is kinda nifty and works well enough if a single point of failure is your thingaling, but what if people simply choose not to get a phone, or don't want a computer, just basic like that, what if?
It feels kind of creepy to me, I don't know...