Never required.
You could ask the govt to take a little less tax out of the gas to keep it within reason.They only piss away that tax money for the most part..
Nor should it be. Tell that to people who are ignorant of Econ 101, or just plain common sense, and they will shrug and say they can make it up by selling convenience items. Go figure. It is difficult to argue with people who think they are getting ripped off by people with black hats and fire and brimstone in their eyes, especially on FR where the given name is Free.