The U.S. labor market is looking a little surreal these days. As a share of the population, it’s the lowest since at least 1967 — the year Grace Slick and her Jefferson Airplane bandmates dropped drug references in the San Francisco-spawned album Surrealistic Pillow, and 37 years before Janet Yellen became president of the region’s Federal Reserve bank. In one, job growth is increasing along with inflation, leaving Yellen, now at the helm of the U.S. central bank, behind the curve with recession-era monetary policy still in place.