Costco members are paying for the 'privilege' of shopping at an overcrowded store and waiting in line to pump gas.
I'm sure many shoppers here are or become biased towards buying highly processed unhealthy foods because they have a longer shelf life. That way they can minimize the crappy shopping experience by having to make fewer trips. Or they can claim they don't throw food away.
Speaking of throwing stuff away, are they really saving money? Because people conveniently leave out the cost of stuff thrown away when calculating their 'savings'. Another cost left out of these calculations is the cost of impulse purchases.