Before I got student assistance I had to work while studying as well, I had to pay for the more expensive prepared food because I didn't have the time to plan a meal, cook it and clean up and all that, even if my depression + undiagnosed ADD combo would have allowed it. People don't know that being poor is expensive in ways they wouldn't think about. This is in a rich country as well, getting fresh ingredients typically is cheaper here too but people forget that the cost of preparation might not be affordable to some.