I don’t recall them prohibiting that, but the issue isn’t what can be labeled food. The issue is that people using taxpayer dollars to buy food have limitations placed on them.
If they want to buy shit food, then they can get a job. In fact, it would be a great lesson to teach a kid: if you want candy, you can mow a lawn, shovel snow, whatever, and then WITH YOUR OWN MONEY you can buy candy.
That’s exactly how my father was able to buy candy, when it was the Depression and he was 8 years old. My grandparents had no money for candy. So, Dad delivered the ice to a neighbor and he got a penny. He then went to the drugstore and picked out his treat.
How do I know this story? Because my Dad was so proud that he earned a penny and could buy his own candy that he must have told it to me 5 times. (RIP, Dad.)