Recall the famous John Maynard Keynes quote from The General Theory of Employment, Interest, and Money that refers to unemployment, "If the Treasury were to fill old bottles with banknotes, bury them at suitable depths in disused coal mines which are then filled up to the surface with town rubbish, and leave it to private enterprise on well-tried principles of laissez-faire to dig the notes up again ... there need be no more unemployment [emphasis is mine] and ... the real income of the community, and its capital wealth also, would probably become a good deal greater than it actually is. It would indeed, be more sensible to build houses and the like; but if there are political and practical difficulties in the way of this, the above would be better than nothing."