Not to spoil the party, but this is not a new idea. Keynesian "pump-priming" in a recession has often been tried, and as an economic stimulus it is overrated. The money that the government spends has to come from somewhere, which means from the private economy in higher taxes or borrowing. The public works are usually less productive than the foregone private investment.
In the Age of Obama, we seem fated to re-explain these eternal lessons. So for today we thought we'd recount the history of the last major country that tried to spend its way to "stimulus" -- Japan during its "lost decade" of the 1990s. In 1992, Japanese Prime Minister Kiichi Miyazawa faced falling property prices and a stock market that had sunk 60% in three years. Mr. Miyazawa's Liberal Democratic Party won re-election promising that Japan would spend its way to becoming a "lifestyle superpower." The country embarked on a great Keynesian experiment: