This week saw the European Commission's President Ursula von der Leyen do something that would have probably been considered the opposite of democracy just a few years ago. She proposed that governments impose a ceiling on certain energy producers' revenues and add a windfall profit for Big Oil majors. Called "a solidarity contribution" or "a crisis contribution," the windfall tax's aim is the same as the aim of the revenue ceiling: manage energy costs in a runaway inflation environment and get...