No, customers prefer to pay electronically. The linked article points out that cash sales in Australia have crashed from 70% to just 47% and is on a fast decline.
I think the point of removing the cash discount is they can use the 'extra' 3% margin earned on those remaining cash sales to subsidize lowering their price via credit card to be more competitive. Their business is based on offering the lowest prices, but the cheapest price was cash only. The discount for cash no longer lures customers to come to their stores, so there's no incentive for the store to continue passing on the discount to the customer.
I think the point of removing the cash discount is they can use the 'extra' 3% margin earned on those remaining cash sales to subsidize lowering their price via credit card to be more competitive. Their business is based on offering the lowest prices, but the cheapest price was cash only. The discount for cash no longer lures customers to come to their stores, so there's no incentive for the store to continue passing on the discount to the customer.