edit: this is all wrong:

The Australian banks make a lot of money off interchange fees. Apple wants a cut of the interchange fee to get access to Apple Pay (which is what ANZ did recently). This has slowed the Apple Pay rollout, but not because banks don't want to share the fee.

By all accounts, the banks do want to be on Apple Pay, but each bank wants to give Apple the same cut as its competitors do (or at least, not a higher cut). And that's a problem because if they collectively negotiate the same amount, they could be accused of anti-competitive behaviour. They've recently gone to the competition regulator to get permission to negotiate with Apple as a bloc.[1]

[1]http://www.businessinsider.com.au/the-big-australian-banks-a...