That's one of the things Obama is trying to do. Since one of the biggest problems is how obviously nutrition rich food costs more then junk food. To be honest, with the amount these people have to live on a day; it's enough for one burger king meal.
Not true at all.. For example:
Boxed oatmeal in cutsey flavorrs runs about $3-$4 a box, but a large container of Quaker Oats runs less than $2.00. The box makes 8 small individual servings - the large container far more than that; at least double for about half the cost.
A frozen chicken dinner can run up to $6.00 for a single serving, yet you can buy a whole chicken for $3.00 if you're willing to cut it up.
A package of pre-formed hamburger patties again runs about $8 for 8 of them; you can buy ground beed in bulk for about $2 a pound and make them yourself.
It depends on what you buy, and how lazy you are.
However, all forms of junk food (anything taxable) should NOT be covered by food stamps. You'd be surprised at how far those food stamps will go when you're not allowed to buy frozen pizza, a bag of chips, and a 12pk of Pepsi...