I nodded along to much of the article, but I really think it's wrong to see this as a model for public grocery stores. The analysis is glossing over a lot of the key factors that Costco uses to make its logicstics model work. You can't buy small quantities, so the staff don't need to spend much time breaking down pallets; you're not allowed in the building without a membership, so there's little need to invest in behavior policing or loss prevention.