"The first function of unemployment (which has always existed in open or disguised form) is that it maintains the authority of master over man. The master has normally been in a position to say: ‘If you do not want the job, there are plenty of others who do’. When the man can say: ‘If you do not want to employ me, there are plenty of others who will,’ the situation is radically altered.’"

-- The Times, 1943 (via http://bilbo.economicoutlook.net/blog/?p=11941)