I shop there because it's convienient- where else can I get groceries, medicine, an oil change, and maybe a gift, all in one stop?
Here's an example- a few years ago, my wife needed a keyring LED flashlight... I had to drive all over town, and ended up paying $20 for one at an out-of-the-way sporting goods store. This was before WallyWorld expanded into the current super store size.
Last week, I passed a display there, and Lo! In a blister pack with a carabiner and penknife, was a similar keyring light- all for $5.
I'll use your anecdote to illustrate my problem with FR/GOP-'conservativism' and the tension between capitalism and commercialism.
'Need an LED flashlight keyring'? For $20 plus fuel? What does 'is' mean indeed. Certainly WM fills this 'need'.
I prefer a greater variety in measures of value than 'dollars' only. Heck, see the etymology of 'dollar'.