" In many companies, managers’ pay is contingent upon the efficiency of their staff as measured by revenue per employee hour. Scheduling software helps them boost these numbers and their own compensation. Even when executives tell managers to loosen up, they often resist. It goes against everything they’ve been taught. What’s more, at Starbucks, if a manager exceeds his or her “labor budget,” a district manager is alerted, said one employee. And that could lead to a write-up. It’s usually easier just to change someone’s schedule, even if it means violating the corporate pledge to provide one week’s notice. "

― Cathy O'Neil , Weapons of Math Destruction: How Big Data Increases Inequality and Threatens Democracy