As a person who used to live off food stamps (I'm still in poverty, but I my parents make enough money to where we don't get food stamps anymore) I can tell you extremely reliably it isn't as simple as you make it out to be.
Take for example my last high-school year. I got free lunches. I didn't complain about that because almost all the money my dad and mom were making, combined, was going to our hotel room, our taxes, our cleaning products, using the washing machine stations our hotel has, etc. I mean almost none of their paychecks were going to food (we weren't going hungry), but I'll tell you right now eating crackers every day like you're basically suggesting we do, which I have done, is a stuffty thing (both for your body and for your tastebuds), so no, this isn't an "issue", and if you think it's a bigger issue than the other money problems this nation has, I don't think I have many words to describe my confusion.
I am very thankful I got free lunches at school because the stuff I was able to buy last year didn't really cut it all that well and if you think this needs to be taken away from us, well, I disagree.