The term originated in the use of feathers to fill mattresses in beds, providing for more comfort. The modern use of the term in the labor relations setting began in the United States railroad industry, which used feathered mattresses in sleeping cars. Railway labor unions, confronted with changing technology which led to widespread unemployment, sought to preserve jobs by negotiating contracts which required employers to compensate workers to do little or no work or which required complex and time-consuming work rules so as to generate a full day's work for an employee who otherwise would not remain employed.[5]