Convenience store paper

(I am speaking of that in the pumps, not in the restrooms.) It ought to be a law (not really) that convenience stores have to check their pumps each morning and if there is not enough paper in the machine to make it through the day, they have to change out the roll. "Pay at the pump" is a convenience for customers as well as for the store, and if they "advertise" as having that convenience, they ought to make sure it is provided.