As you know ANZ were one the first, if not first, bank to support Apple Pay in Australia. They decider to accept the "high rate" per transaction that Apple offer so they would be the only bank with Apple Pay in the hope of attracting customer to switch to them. The other Big Banks decided to wait in the hope of a better rate. If they did get this they will be in a better position than ANZ. The other early Apple Pay adopter in Australia was American Express, who charge a high annual fee and charge a high percentage to retailer, this is why some place in Australia don't accept American Express and why they could easily afford to pay Apple's rate.
I am not defending the Big Banks, they are fee to support Apple Pay or not, just as you the customer can choose to switch banks. We just need to remember that Apple is larger than any of them and all partly are ruthless negotiators.
Back to the original article. It is good that the ACCC is looking at this, whoever's way their ruling goes, Apple and the banks involved must abide by that. If Apple wants to sell the iPhone and have Apple Pay in Australia they must so under Australian law and ACCC rulings.
ING Direct offer Applepay and absorb the costs, go figure. They also put actual interest that means something and don't charge for me using any ATM, so long as I have a minimum deposited into my account per month. It's a case of the 3 of the 4 big banks trying to cry foul.