Counterpoint - the two major Australian supermarkets both sell in-store “finished” cookies that are like crack. They’re delicious. They come in a pack of 5 for $3.50 but 5 is way too much. I’d gladly pay $1 each for them as a snack while I’m shopping
There are occasions where shrinkflation does make sense. In the Mars case, I’d say there is consumer demand on the health side as well. Yes, a Mars bar is never “healthy” but 40g is less worse than 60g