This is what I do too. I usually only have to go to Coles or Safeway when a recipe calls for something obscure or niche.
The thing is, they are usually dry goods like spices or medical supplements, which can also be bought online.
Safeway and Coles are only there for convenience.
Double Demerits on long weekends are not a deterrent to the demographic of people who do speed when travelling unfamiliar roads.
In Victoria, Potholes are a big enough deterrent for those that do speed, either by encouraging drivers to keep below the speed limit or by disabling the vehicles of people who ignore them.