In this articleWMTShoppers at a Walmart store in Secaucus, New Jersey, U.S., in March 2024.Gabby Jones | Bloomberg | Getty ImagesWalmart is known for its low prices and no frills approach.So it may come as a surprise that wealthier shoppers are helping to fuel the retailer's growth.For more than two years, the discounter has noticed more customers with six-figure incomes shopping on its website and in its stores. Households earning more than $100,000 made up 75% of the company's market share gains in the fi ...