They should ban anything that isn’t relatively healthy food. Meat, veggies, fruits, beans, bread, yogurt, ect. No candy, cookies, soda, junk cereal(cereal with more than 5g of sugar is considered no good)chips. Let them go to work if they want to buy that junk. Or they can buy the ingredients to make it themselves.
The problem lies with who determines what is healthy.
You can buy all those items on food stamps...cakes, pies, ice cream, and candy. The one thing you can't buy are ready made items, like hoagies. You have to buy the ingredients and put it together yourself. No non-food items either...