It doesn't really make sense.
The food product producer is not selling to me directly, they sell to the store, who then sells to me.
Apple is not selling me the app, they are very clear about this, my relationship is with the App Developer, they are just a "payment processor"
So comparing the App Store to traditional retail store is no where near a proper analogy
There is a moral imperative that copying of software, which costs almost 0, is taxed per unit, just like physical goods, where there is a storage cost, a transport cost, etc.
I'm being ironic, obviously. Apple's App Store profits show that they're basically just sharecropping developers. Their operating costs are minimal and the fact that they're allowed to charge per unit, like they're Walmart and have to stock actual shelves, is quite ridiculous.