What you pay today is what the owner of the station expects to pay for the next load of gas (plus a few cents per gallon, at most). Otherwise the station would get fewer and fewer gallons of fuel as prices were rising, or be losing money.
That is the reason prices seem to go up faster than they come down.
As has been mentioned, the money to be made is made in the convenience stores, and back in the day, on vehicle servicing, tires, belts, and hoses, parts and repairs (not often seen now).
But lifelong politicians who don't know how things actually work would not understand that.