Cooking is labor, intensive labor at that. Someone working 50 hours a week is going to have a lot less energy to dedicate towards cooking their own food, and will thus likely eat out more.
Truly, I don’t think encouraging people to cook at home is a viable solution. We need low cost, high quality, publicly owned and operated community kitchens.
Cooking for one is highly inefficient, both in time and resources. Cooking for 500 is much better in both.