The sticker price is legally binding - it constitutes an offer, and the cash register surreptitiously charging a higher price from what the customer has agreed to constitutes fraud. The problem is that asserting your rights takes time, resources, and energy that people shopping at these stores generally do not have. The people that would have the ability to push back instead just use their resources to move on and shop somewhere else that isn't immediately abusing them.
The sticker price is legally binding - it constitutes an offer, and the cash register surreptitiously charging a higher price from what the customer has agreed to constitutes fraud. The problem is that asserting your rights takes time, resources, and energy that people shopping at these stores generally do not have. The people that would have the ability to push back instead just use their resources to move on and shop somewhere else that isn't immediately abusing them.