I seriously think you must have been drunk when you wrote this because that's how outlandish a statement that is. Let's reason through this, shall we?
What is WalMart's tagline? "Always low prices. Always." Is WalMart known for having high quality merchandise? Nope. Good service? Nope. Selection? Yeah, pretty good, but if you ask 10 people why they shop at WalMart, I guarantee they will tell you "Because it's cheap." WalMart has in industry wide reputation for unmercifully beating down suppliers to the very last penny to lower their prices on merchandise that WalMart sells.
But you're right...price has nothing to do with WalMart's success.