That's why people walk into Costco to buy soap and walk out $600 later. There's the basic stuff you go there to buy, and then there are all the hidden treasures that are worth hunting through the rest of the store for. And when people find those treasures they load up.

In other words, Costco relies on impulse buyers who have the money to buy stuff they didn't know they wanted until they set foot in the store?

As a consumer, I want to buy from the retailer that is creating the least value for their stockholders, paying their employees a pittance, is not overpaying the executive "talent" and is not beholden to suppliers. Then I know I am getting a good deal (until they go out of business.) I want them to have crummy profit margins and frequent clearance sales on quality products, due to overoptimistic projections. And when (not if) they die, someone else can take their place. In summary, I want a vastly inefficient business as long as the inefficiency consists of failing to extract the last pound of flesh from their customers and not in product quality, selection and price. To some extent, Rite Aid and Sears fit the bill.