Saying that about the NFC subsystem, is like saying Apple should only allow the iPhone's WiFi and Bluetooth radios to talk to other Apple devices. Verizon, Sprint and others already tried that kind of lockdown with NFC a few years ago. Perhaps you're not aware of Isis (later called SoftPay).
Some of you are confusing Apple Pay with NFC. That's like confusing iMessage with the WiFi radio it uses.
Banks are not asking to use Apple Pay; they want to access the NFC subsystem. It's like someone wanting to use WiFi for their own messaging app, and Apple saying no.
Apple uses its intimate knowledge of us via iTunes, location services, etc to implement targeted iAds. Just because they've been rather unsuccessful at selling such ads (because of... no surprise... greedy rates), does not make it any less a use of our private info.
Not to mention raking in bilions from Google search kickbacks by selling the top search position to them. Or blackmailing banks into paying a royalty just to let their own banking customers register with the non-Apple credit card applets in the Secure Element.
These are some ways that Apple pimps out its users, so it can claim to have clean hands even while making billions in kickbacks behind the scenes.
I'm with you as far as how aggravatingly slowing-down ads have gotten. My iPad browser hangs constantly from too many background ad streams, as does Chrome on my older laptop computer.
OTOH, ads pay for many sites we all like to use. E.g. anyone here who's not paying MacRumors a yearly membership fee, but complains about ad supported services, is a hypocrite.
Not only does Apple dodge paying taxes in every country it operates in, but Apple Pay's background fee slowly sucks extra money from target countries' banks into Apple's offshore accounts. Most of which, as few people know, ends up being stashed in New York banks by its Irish subsidiaries... where Apple cannot use it, but the banks can!
So, as an American, I would like to personally thank the people of every other country that is buying iPhones at a huge markup, or sending Apple Pay fees via their banks, since those nearly two hundred billions of offshore profit are being used by American banks to fund American business loans and mortgages. The monetary assimilation has begun. Resistance is futile