a) most people don't take things to extremes; b) employee time is not a problem, as they're there anyway; c) if all grocery stores act like this (and they do),

a) most people don't take things to extremes; b) employee time is not a problem, as they're there anyway; c) if all grocery stores act like this (and they do), you have to keep shopping there anyway (and they know this). So what will actually happen, with you and me and everyone else, is that we'll grumble about how they moved the cheese again, we'll wander around the store until we find it, and we'll be exposed to some more products and implicit advertising in our search, and we'll forget about it as soon as we exit the store. Over time the store will increase its profits 1.3%, and the competing store "where everything is always in the same place as last time" struggles because their prices aren't maximally optimized with the same grocery store software everyone else uses.