Warren and Tyagi demonstrated that buying common luxury items wasn’t the issue for most Americans. The problem was the fixed costs, the things that are difficult to cut back on. Housing, health care, and education cost the average family 75 percent of their discretionary income in the 2000s. The comparable figure in 1973: 50 percent. Indeed, studies demonstrate that the quickest way to land in bankruptcy court was not by buying the latest Apple computer but through medical expenses, job loss, foreclosure, and divorce.