This is the holiday when gluttony is not just acceptable, it’s almost required if you try to taste everything on the Thanksgiving table. But ask yourself: is this the only time you eat more than you ought to? Obesity is a national epidemic, and over-consumption of another kind is on the rise. Credit card debt is up by 66 percent since last year and by 368 percent since 2009, when the Great Recession made Americans try to be frugal. Why do we want so much more than we can afford and, probably, more than we need? Is there a relationship between mindless eating and manic buying?