You won't ever see that at Walmart. Walmart has a reputation as a discount store for somewhat middle/lower income shoppers.. but they have the strictest most technologically advanced retail chain in the world. They don't even truly consider themselves a retail chain, they're a 'vendor distributor' or some such nonsense. They don't sell products, they sell floorspace to vendors. If a vendor's truck is where its suppose to be, at the exact time its suppose to be, they cut them out and order the goods from elsewhere.
They don't care about the customer. There's always more.