Well, there were some specific details affecting my personal situation. These incidents happened during my first two years of college, putting myself through school (I had a private scholarship for the tuition and books but not room and board), I had zero support system (shitty abusive family) and was living in a college town where jobs were scarce. I was working PT in retail and it was enough to cover student housing but not food. I was also stupid(er) at the time and wasn't familiar with food stamp programs or other assistance programs. My parents refused to fill out the FAFSA and I couldn't appeal for federal aid at that school unless I submitted an appeal where I would have had to talk about all of the abuse I went through and it was just far too raw for me to do so. On top of that, the school made it clear that appeals regarding independent status for financial aid were rarely granted.
I transferred schools, got an even better scholarship at a private university, worked full-time or close to full-time for the rest of college waiting tables/bartending in Chicago, made decent money, and had food thrown at me at work. And I finished with honors with my finance degree.
So the story, while shitty, has an OK ending. I agree that most people should not be in that situation but it was temporary for me and it got better. Maybe I got lucky, maybe I am stubbornly tenacious, maybe it was a mix of both.
Spaghetti aglio, olio and peperoncino.
Sandwiches, mostly. I was stuffing myself with them for 3 years when I was studying, though it was not as much out of necessity as that I had very little spare time and couldn't bother myself with cooking, and I could control my calories intake better with them, which allowed me to stay relatively slim. They were still one of the cheapest options possible, though. Doesn't beat getting a can of tomato sauce, some ham, cheese and pasta and cooking enough for 2 days, but it was cheap nonetheless.