It would be hard not to notice that we are living in a world of increasing inequality. According to data collected by the Federal Reserve, the share of the nation’s wealth owned by the top one percent of U.S. wealth holders increased almost 50 percent, from 22.8 percent in 1989 to 31.9 percent at the end of 2025.  Meanwhile, the gap between high and low earners has also been expanding.  One widely used measure is the ratio of wages of workers at the 90th percentile of the earnings distribu