| I'm a little shocked that of all the comments so far, no one has mentioned the financial risk borne by this whole value chain. OP is operating as if it's just a debit system moving money from one account to another but: - For many consumers there isn't sufficient money in the account to settle all the one-time and ongoing transactions they are liable for -- credit cards are giving you a revolving loan, there's risk it will not be repaid, and that risk ends up reflected in processing fees - For many _businesses_ managing cash flow is existential -- as merchants they want to be paid as quickly as possible, but as B2B customers they want to have 30-60 days to sell the input goods they've purchased so they can pay for them upstream. There is a premium for that flexibility that gets reflected in processing fees. - For both consumers and merchants, fraud risk is real and while it's the most solvable part of all this it's a real (and costly!) factor today. That risk for fraud gets moved upstream to the networks/acquirers/processors/issuers and that premium shows up in (you guessed it) processing fees. If you want to switch the world to a debit-based system where economic transactions are limited by cash on hand, I'd argue that's a poorer and less dynamic world than the one we're operating in today. |
Payment networks don’t provide credit or any kind of liquidity whatsoever, that entirely provided by the various financial entities that communicate via the payment network. The reason Visa and Mastercard haven’t been easily replaced is simple network effects, nobody wants to integrate with a payment network where there’s nobody to transact with.