Also, the use case and marketing strategy for your two scenarios are different. A product like Snickers is a quick on-the-go fix of food. The marketing connection for a salad is different -- the money and full feeling is in the dressing. Many people translate "salad" as leaves with goops of fat/sugar on them. If you are a oil/vinegar person, you're an awful customer for Kraft.
The food industry is attacking traditional, lower margin foods to make more $. The best example is the push against milk in favor of nut and grain based white liquid. All of the substitute products are mostly water and corn syrup, but are sold at dairy prices.