Keynes showed that decisions to save and invest were temporally separate, and that savings did not necessarily lead to investment. Saving could just as easily lead to hoarding and reduced consumption. The job of the state was, then, to alter the investors' investment expectations by raising prices so that profits could be made, thereby making it rational to begin hiring workers again and, by doing so, to get out of the slump. Rather than savings leading to investment, consumption via workers' paychecks ultimately drove investment. Today we call this demand-side economics.

Mark Blyth, Austerity, loc. 342