Why exactly wouldn't it scale? The challenge is to make sure other stores are run in the same dedicated fashion and not by some dimwit that only hires other dimwits in order to cut costs. Retail chains seem to become prone to this once the whole organization gets big enough to put in place metrics that measure store performance mostly on a revenue basis and those in charge start to manage by the metrics instead of looking at reality because there is no more incentive for them to do just that.