How about they only allow Food Stamps to be used on WIC foods? This extra money for fruits and veggies is insane. It means that those who were already eating responsibly will be able to afford junk food and healthy food.
WIC in some regards is too restrictive, such as making it difficult to buy potatoes.
But it is certainly reasonable to say “we give you money for food, you can only buy THESE foods, no Little Debbie or soda for you”.