@comeflywithme I respectfully disagree.
For premium cards, the card issuers charges a) a higher annual fee and b) higher interest rates on balances. Credit card debt is something in the region of $30 billion in Australia at any one time.
The banks make a good margin on their credit card business and can afford to go about their business without slugging small business merchants with the highest transaction fee AND the highest surcharges on premium cards.
As an end user I'd be happy to pay a small additional surcharge to use my premium card as long as it's about the value of its point earn, but it's not me that pays that surcharge under the old or new system.
The asserted problem with the previous regime was that credit card surcharges were blended (i.e. all Visa and MC = x%, all Amex = y%), so in effect the low-cost Visa / MC cardholders paid a higher fee than they should have which was used to supplement the points and benefits of premium cards.
Whether that's an accurate assessment of the market or not, I don't know, but I'd expect that there's more to it than that (annual fee, balance interest, volume and value of transactions, packaged cards with mortgage and banking products, international cards etc).
Big merchants can negotiate bulk / lower rates on transactions, smaller merchants don't have that ability.
Basically, the big banks had their cake and ate it too. The new rules simply reduce the benefit to us, the points collectors. The banks still have their cake and eat it. I'd be interested to see if the fees to small merchants are reduced accordingly. If history is any guide (e.g. ATM fees), I doubt that will happen.