What is scarce is money. The lack of money to spend on goods is what keeps the unemployed resources from producing more goods. Work, moreover, instead of being a curse, is desired more than anything else because the alternative is not enjoyment of leisure but the suffering of unemployment and deprivation. Of course, if people could get income without they would not object too much (although their self-respect in feeling they are useful members in society who are earning their income is too easily underestimated). But it is only by finding work they can obtain the necessary income they need.

On the causes of unemployment (1951, pg.147-48)