>If Amazon is undercutting them That's the actually important question. If Amazon is convincing people that delivery service is worth paying a premium for, tha

>If Amazon is undercutting them That's the actually important question. If Amazon is convincing people that delivery service is worth paying a premium for, that's a new product/service that the economy is producing and employing people for, and is itself economic growth. If Amazon is instead more efficient and competing on price, then they're only freeing up the ability for the displaced to do productive economic work elsewhere in the economy.