No, it's not about economies of scale. It's about non-monetary costs. What I'm saying (using your analogy) is that Starbucks actually works hard to get good su

No, it's not about economies of scale. It's about non-monetary costs. What I'm saying (using your analogy) is that Starbucks actually works hard to get good suppliers. If you open a coffeeshop and use beans from the local supermarket (hoping to pay market price - it's a market, right?, of course you pay a lot more and get worse quality than if you spend some time tracking down a good supplier.