Lost Decades looks at why the explosion of debt happened through the traditional lens of supply-and-demand. It examines the motivations and situations of people on both side of this debt. Why did demand for debt increase in the United States? The first reason Chinn and Frieden identify is the huge deficits run during the George W. Bush years. These are the trillions spent on the Bush tax cuts, the expansion of Medicare part D and wars in Iraq and Afghanistan that weren’t paid for.