The comparison between food/exercise and income/expenses is analogous, but not equally challenging. It's easy to make $250k a year and only spend $50k because t

The comparison between food/exercise and income/expenses is analogous, but not equally challenging. It's easy to make $250k a year and only spend $50k because the diminishing return of spending money-- a single person can live a reasonably decent life on $50k. Compare this to earning $60k, spending the same amount, but spending less. Exercising completely wipes the diminishing return of food, albeit temporarily. Food tastes better and you are hungrier after a workout. It is easier to exercise financial constraint than dietary constraint.