Something is horribly wrong with both America's employment situation and with the way we measure it. In case you missed the news, the economy generated just 74,000 payroll jobs in December, but the unemployment rate dropped by three tenths of a percentage point, from 7.0 percent to 6.7 percent. How can that be? Simple: more and more people have just given up looking for work. The percentage of prime age people in the active work force is now just 62.8 percent, the lowest since 1978, a time when far fewer women worked . And the proportion of long term unemployed remains stuck at historic highs.