[dylan604]

Lots of poor people do not have bank accounts, so there's no way they can use electronic only systems.

[9nGQluzmnq3M]

Electronic only systems like M-Pesa can replace banks.

https://en.wikipedia.org/wiki/M-Pesa

[mixmastamyk]

Not true, you can load money on a smart card via kiosk. This is already available almost everywhere, although would need to be accepted at POS.