> Whilst this is true, it's also true that until 2008 Visa was owned by the issuing banks, and since Visa IPO'd the banks have maintained significant investments. So I don't think it's quite as clear cut as "the banks vs the networks". They have a somewhat symbiotic relationship
This is not really the issue. Yes, Visa was owned by banks (so was MasterCard) but they have always taken between 5 and 10 basis points of each transaction (it is not like the fees came down after becoming public). The interchange is high in the US because they ABA and other groups lobby aggressively to keep them that way. Also, given the prevalence of credit cards in the US, the networks have been able to negotiate aggressively with the merchants. When Visa introduced their Signature card product, they increased the fees arguing their product does not have a 'fixed limit' so consumers will spend more which will help the merchant so they should pay more in fees. Amex makes the argument even more so and that's why their interchange tends to be in 3-7% range -- most merchants are not smart enough to do the math and say their customer segment is not really the 'typical' Amex segment and if they don't accept Amex, the customer would have just used a Visa / MC instead. So these rates prevail.
If you ask me why rates are different across geographies it really comes down to the will power of the govt. to set the terms. Most emerging economies see Visa / MC as a threat as their entire country will become dependent on a foreign entity to process payments. They generally tend to set pro-consumer regulations (but largely to annoy Visa / MC/ et al.).
To my knowledge only in the US (maybe Canada) where it is illegal for a merchant to discriminate against a credit card user. After a lengthy lawsuit, the networks and the merchants settled that the merchants can give a 'discount' on cash transactions but cannot put a surcharge on card transactions. The math is the same but the psychology very different.
I wish the rates are fixed amount per swipe and not a % of the transaction amount. Why should it be? If the networks operated seamlessly and allowed new entrants, it would have been like today's cloud computing pricing (almost a commodity) but alas we get only IBM style pricing.
I hate credit card companies from the bottom of my heart but until there is another payment vehicle that is just as convenient it will be stupid of any entity not to partner with such providers.