This worked so well for France that Belgium had a real estate boom with the new tax on millionaires was announced. And New Jersey learned that millionaires have a tendency to leave when confronted with higher taxes. But Illinois? Well, per Michael Madigan, Speaker of the Illinois House of Representatives, Illinois is different: “Well, if they’re in Illinois today, they’re probably so much in love with Illinois that they’re not going to leave,†he said, according to the Tribune–a backhanded acknowledgement of how poorly the state is already doing.Madigan may also be encouraged by California’s example, where millionaires have largely...