Tony Barzar started working at Costco in 1986, gathering carts in a Tucson parking lot for $5.85 an hour. Today, at 60, he’s working the register, making $32.90 an hour — and he’s a millionaire. How is this possible? It’s thanks to Costco’s employee retention policies, according to the Wall Street Journal. The retailer pays more than almost anyone else in the business specifically to keep workers like Barzar around for decades, not months. And its policy has worked.