An employee who is bright enough to spot a complementarity may not be content with repairing kitchen appliances, so companies will find that some of the pressure to break down occupational barriers will come from the bottom up.

ECONOMIST: Why pay is becoming less equal

Miners continued their pressure, leading to the Occupational Safety and Health Administration, marshalling public force to protect their health in the private workplace.

CNN: Commentary: Don't cut our (public) health care