Systems like Australia's NPP and associated PayID/PayTo schemes, India's UPI, US FedNow etc replace all of the middle-men clipping the ticket with a close to direct account-to-account transfer, regulated by the appropriate reserve bank or equivalent.
It doesn't work across currency borders (yet) but as these systems ramp up, with their substantially lowered costs and reduced friction, even the big guys like Visa/MC are going to be affected.
And that's even before the central banks work on create their own digital coins (stable by default because backed by the fiat currency issuer).