With 5 kids myself, this is indeed true. Delegation is important and also a "zone defense" became really important. "man to man" was out of the question.

But if you are already making 2 school lunches, how much longer is 5 really? You are already making breakfast lunch and dinner each day, how hard is it to add more food really. There is cost involved but making the meal isn't that much harder, at least for us.