Perhaps the oddest and most depressing fact about the U.S. economy these days is the lack of real wage growth. The unemployment rate has been below 5% since December, and productivity growth is still looking strong. Yet wages and salaries, adjusted for inflation, are down for virtually every broad occupational category. According to the latest numbers from the Bureau of Labor Statistics, average hourly earnings for production and nonsupervisory workers are up by 3.8% over the past year. That may sound halfway decent, but it still lags the 4.3% increase in consumer prices over the same period (see BusinessWeek.com, 8/4/06,...