After working as a Walmart store manager in the Dallas area for more than a decade, Greg Harden has seen it all. Walmart Inc.’s procedures for managing schedules for hundreds of store associates, keeping track of delivery vehicle arrivals and even operating gasoline pumps for customers had all become second nature. But earlier this year he got some news about Walmart that shocked him. The retailer redesigned its compensation scheme in a way that would significantly increase store manager pay with stock grants and bonuses. With the changes, Harden could make as much as $530,000 this year. “I almost fainted when I found out,” he says.