Berkeley, Calif.

THIS promises to be the worst Labor Day in the memory of most Americans. Organized labor is down to about 7 percent of the private work force. Members of non-organized labor — most of the rest of us — are unemployed, underemployed or underwater. Friday’s jobs report from the Bureau of Labor Statistics will almost surely show fewer new jobs created in August than the 125,000 needed just to keep up with growth of the potential work force.

The national economy isn’t escaping the gravitational pull of the Great Recession. None of the standard booster rockets are working: near-zero short-term interest rates from the Fed, almost record-low borrowing costs in the bond market, a giant stimulus package and tax credits for small businesses that...