You're confusing costs with pricing. Retailers set the price they show customers to what the market will bear and not a penny less, regardless of their costs. Sometimes they make money. Sometimes they even lose money on an item for strategic reasons. It's only competition that forces prices down though.
So, someone could open up a cash-only chain store and have lower costs that could allow them to price things a couple percent lower, but the absence of that business suggests that they know nobody wants to go to the trouble of paying cash anymore for a savings of a few bucks a month.
I expect that if credit card fees went to 0 tomorrow, no prices would change (though I'd lose thousands in value I get from points each year). Many retailers like grocery operate on thin margins already, so they'd be especially eager to keep the block of cheese at $2.69 instead of dropping it by a few cents.
And even if you could prove that eventually some retailer would give pass on that savings to customers, I still would rather use a card than deal with cash. And stores know that they sell more than they would if (1) everyone had to carry cash everywhere they go and also (2) if people couldn't spend on credit. That's what the retailers are spending 3% on.
So, someone could open up a cash-only chain store and have lower costs that could allow them to price things a couple percent lower, but the absence of that business suggests that they know nobody wants to go to the trouble of paying cash anymore for a savings of a few bucks a month.
I expect that if credit card fees went to 0 tomorrow, no prices would change (though I'd lose thousands in value I get from points each year). Many retailers like grocery operate on thin margins already, so they'd be especially eager to keep the block of cheese at $2.69 instead of dropping it by a few cents.
And even if you could prove that eventually some retailer would give pass on that savings to customers, I still would rather use a card than deal with cash. And stores know that they sell more than they would if (1) everyone had to carry cash everywhere they go and also (2) if people couldn't spend on credit. That's what the retailers are spending 3% on.