Maybe this is harsh, but why would I care? It sounds like a problem for the store. And many of the mom and pop shops around me require a minimum purchase or charge a 50 cent fee for using a card.
The store passes the cost right back to you, the consumer, in the form of higher prices. You didn't just think they absorbed the cost out of the goodness of their hearts, did you?
You can negotiate price with cash.
The payment card industry is a parasite on all of us, full stop.