Since the crisis began, the government has responded in a classic Keynesian fashion. It passed three tax cuts (one under George W. Bush and two under Barack Obama), set in motion automatic stabilizers such as unemployment insurance, sent money to state governments to keep their workers employed, and spent on infrastructure and other projects. Above all, the Federal Reserve printed money to make it easier for consumers and businesses to get their hands on cash and thus spend it.

But businesses and consumers are not spending. It is not that the stimulus did not work. The federal government seems to have spent the money reasonably well, with pork and corruption kept to low levels. The problem is this kind of spending is meant to be a bridge to get the private sector spending again. The theory is the government would create demand while the private sector cleaned up its balance sheets. But corporate America is flush with profits - yet is not spending.

Why are consumers and businesses not spending? Everyone is haunted by the crisis of 2008. Consumers are paying down debts, preserving cash, hoping they keep their jobs and their houses stop sinking in value. Businesses, having come from a near-death experience, are being conservative in an atmosphere of uncertainty. With little fresh demand in sight in the United States, why would they hire workers or build factories? And if they do invest, they will do so in emerging markets, where consumer spending is growing by double digits and nearly 50 percent of the S&P 500's profits come from anyway.

Unfortunately, the government's efforts to resolve the crisis amount to giving the country the hair of the dog that bit it. Washington is asking consumers to stop saving and start spending, while the government issues more debt and the Fed lowers rates - all measures designed to increase debt. In other words, we are fighting a crisis caused by excessive debt by encouraging excessive debt. Is that really the best way to get growth?

The investment manager and guru Jeremy Grantham says no. In his latest quarterly letter, he points out that over the last generation, American government has created conditions that encouraged everyone to keep accumulating debt. But far from getting a bang, the country's growth rate actually slowed down over that period. In fact, the effect of all this government-subsidized debt has been deeply destructive. It created asset bubbles in stocks, bonds, commodities and more. One stunning chart in his letter underscores the extent to which the Fed created what he calls "the first housing bubble in history," meaning the first time that U.S. house prices rose dramatically across the board - and are now falling just as dramatically.

Debt-fueled growth "is, in an important sense, not the real world," Grantham writes. "In the real world, growth depends on real factors: the quality and quantity of education, work ethic, population profile, the quality and quantity of existing plant and equipment, business organization, the quality of public leadership especially from the Fed in the U.S., and the quality not quantity of existing regulations and the degree of enforcement."

This strikes me as the common-sense view of economics. We can push and pull fiscal and monetary policy all we want, but long-term growth depends on these broader and deeper factors.

Ironically, one policymaker who seemed to understand this was Barack Obama. Twelve weeks into his presidency he gave a speech at Georgetown University making the case for the long-term rebuilding of the American economy, away from an overreliance on debt and consumption and toward productive investment. Obama should have given 25 versions of that speech by now and relentlessly offered policies that expand on its basic focus on long-term growth. The public would trust in this approach far more than in the magic of the Fed printing money - and in this regard, the public would be right.