Income disparity reaches highest since 1920s, paper reports, with recent Wall Street boom partly to blame. The income gap between the wealthiest and poorest Americans grew to its widest level since the 1920s, according to a report published Friday. Citing Internal Revenue Service data, the Wall Street Journal reported that the wealthiest 1 percent of all Americans earned 21.2 percent of all the nation's income in 2005, up from the previous high of 20.8 percent in 2000. Conversely, the bottom half of working Americans earned just 12.8 percent of all the nation's income, down from 13.4 percent in 2004 and...