How have changes in labour law affected income inequality in the United States over the last half century? Curiously, even though employers have increased the degree to which they break labour law, workers have decreased their utilisation of the National Labor Relations Board (NLRB) and the strike. How do we understand the unwillingness of labour to utilise the NLRB and the strike when under increasing attack? To answer these interrelated questions, I analyse three central changes in federal labour law and norms from the middle of the 20th century to present: the usage of permanent replacement workers, adjudication of the main federal labour law—the National Labor Relations Act—and change in administration of the NLRB—the body charged with overseeing the National Labor Relations Act.