> Why would they lower prices? Wal-Mart could lower prices now for cash or debit card purchases but they don’t. You're from the US, right? Then you should be f

> Why would they lower prices? Wal-Mart could lower prices now for cash or debit card purchases but they don’t. You're from the US, right? Then you should be familiar with gas stations which have two sets of prices: an expensive one for credit card customers, and a cheaper one for cash customers. Last time I road-tripped through the California/Oregon area, those were a thing and quite common. Why doesn't Walmart do the same? Probably because they have 50k prices to consider, while a gas station has like 3 or 4. But the gas stations demonstrate that there obviously is a possibility for reduced payment costs to end up at the customer in the form of reduced prices. Now imagine taking away the burden of having Walmart (and any other retailer for that matter) add 50k additional prices to their inventory by simply capping all CC fees at 0,3%. If you don't see the likelihood for a reduction in prices for customers in the long run, you either don't have much trust in free markets, or you must assume that the market in question is not free at all, but burdened by collusion.