The Janus decision by the U.S. Supreme Court on Wednesday was another blow to the labor movement. It creates a financial incentive for public sector union members to leave the union while continuing their job.

Ever since the beginning of the 1980s clamp-down on the U.S. left, signaled by President Ronald Reagan’s firing of the air traffic controllers to end their strike, the labor movement has been besieged by what billionaire Warren Buffett described in the New York Times as a class war started by his class. It’s not the first time this has happened in U.S. history.