I bet you that over time, because we come up with new ideas to grow sales, we end up with about the same number of people making more money.

The sales floor probably gets more people. And what we're seeing in supply chain is that it's basically the same number of people with just a whole lot more productivity, but their jobs change.

Customer satisfaction has always been the number one goal for retailers, and in the future, customers will be more empowered than ever to drive the change they want, as they get more control over their shopping experience.

I think what we've seen happen so far is that as we've applied technology for the picking process in the store, for example, is that job composition has changed but we have about the same number of people.

People were wondering, "How do you even do food e-commerce? Are we going to be dropping strawberries on somebody's doorstep? It doesn't feel like we're going to be doing that". But what we believed is that in the US pickup might work. So we started in California and then Denver, and a team started working to put everything in place to do grocery pickup and in the beginning we even had a separate app. It was an orange online grocery app.

I've drank all the Kool-Aid and am completely convinced that Walmart should be here for the next generation of retail, because we're so wired to fulfill our purpose of helping people save money and live better.