There's no reason Section 75 protections couldn't be extended to debit cards, except that in the mid-1970s banks were lobbying very hard for credit cards to become more legitimised and S75 was the successful result.
The banks took on a little bit of risk and in return unlocked a free money generator.
On the contrary debit cards are revenue-neutral or even loss-making for them
The banks took on a little bit of risk and in return unlocked a free money generator.
On the contrary debit cards are revenue-neutral or even loss-making for them