As the Supreme Court on Monday derailed claims of gender discrimination by scores of women workers at Walmart stores, the American labor movement absorbed yet another substantial blow.In recent years, class-action lawsuits have been employed by workers -- particularly lower-wage workers -- as a substitute for the force that collective bargaining once held in an era of broader union representation: By banding together in large-scale lawsuits, workers have effectively organized themselves into unified, powerful voices, gaining leverage in negotiations with management.More... (http://www.huffingtonpost.com/2011/06/20/walmart-too-big-to-sue_n_880930.html)