Comment by mrguyorama

Half of the purpose of SNAP is to be yet more subsidy to American megafarms. That was literally how it was done by FDR, and why it is administered by the department of Agriculture. It intentionally drives food production that wouldn't necessarily be profitable on its own because most first world countries, including the US, found that letting Capitalism run free on your food supply would result in booms, busts, and cyclic famine.

Soaking up grain and corn syrup supplies is intentional. Ethanol in our gas has a similar purpose.

However, the primary reason you should not care about SNAP recipients spending money on soda or chips or junk is because it's usually a good price/calorie ratio, so for the half a percent of Americans that literally don't get enough to eat, it can be sustaining, if not healthy, but for the rest, the idea that people shouldn't be able to have a small luxury because it's socialized is just too much.

Taking candy from children is probably just not worth the squeeze. The entire federal SNAP program is ~$80 billion.

Lookup WIC. It is a very restricted program of food assistance, and spends immense effort and money of "only healthy" or "no junk" and parental education and supporting nutrition, and it really pays off, but it does that by relying on ENORMOUS free labor from parents and stores. A WIC checkout takes significantly longer than average, is more error prone, and is miserable for all involved, for like $30 of bread and cheese.