30 odd years ago, I worked for about 6 months at a Maroubra, Sydney, Caltex petrol station. Almost every day, we would be advised by Caltex HQ to have the prices changed, sometimes even twice a day. My job was to change the pump prices, then the number plates on the big Caltex signboard.
I asked and was told there are Caltex staff going around to check on competitors' prices and adjust them if necessary. Now, that's real competition. The half arsed so-called competition in Singapore? Look no further than the telecoms.