The govt both sides really want the economy here to eventually move to electronic so it can be tracked hard - however it was obvious the banks along with the $$$$$ credit card companies were making making a killing even at 2.5 % of all retail purchases ... so it was better to encourage merchants adopting close to free services like eftpos again which is about 0.2% max of a transaction.
Caveat - Of course some big retail stores can negotiate down the transactional percentage they pay in fee to Visa, Mastercard or Amex ... though I don't think any here got anywhere near as good a deal as Stripe. [1]
[1] https://stripe.com/au/resources/more/eftpos-fees-and-charges...
> where Visa and Mastercard debit is about 0.5%, and many credit cards are an average of 0.9% or more.
In an ideal world (well, my ideal world), these fees would be called out so that you, the customer, could choose not to pay them. You might see, "if I pay cash this $100 product will cost $100 but if pay with my platinum card it's $105. I can save $5 by paying cash".
Mastercard and Visa forbid this for two reasons: (1) they don't want you choose the cheaper cash option (2) they don't want a competitor to be able to offer a lower fee. In the example above, they charge $5 but a competitor could charge $1. You'd might pick the cheaper option but you're unaware of it since they forbid the merchant from offering.
They can only do this because they effectively have a duopoly on the market. Don't play by their rules, lose 99% of your customers. Various governments try to fix this. The cynical reason it hasn't been fixes is they pay off politicians to make sure it doesn't get fixed.