There is a pretty big security reason $8.6b a year in the US:One issue with NFC payments is security, how to make sure your credit or debit card information isn't copied at the terminal or by someone walking by with a reader. You don't want to be transmitting your credit or debit card information in the clear, so it's going to need some kind of encryption with a rotating, one time encrypted token being used.
Issues that will have to be addressed are how do you keep things in sync with your credit card company. The one advantage for Apple Pay is that it will work with Apple's Passport app, so you only have to create a virtual card once much like you can do with your PC Points card.
There really is no incentive for either merchants or the banks to underwrite this cash grab by Apple, not all merchants have NFC enabled terminals. Would all purchases require you to use a thumb print or PIN number to authorize a payment or will there be a minimum purchase before you have to authorize a payment?
http://searchfinancialsecurity.tech...aud-costs-86-billion-per-year-Aite-Group-says