I think some people confuse "not having much money for a whole" with "living in poverty".
At uni I lived in catered halls (which cost the full amount of my grant) where I got breakfast and lunch. I had £2.50 per week (parents gave me £10 per month as that's what they could afford) for everything else - lunches, books, travel, toiletries etc. I managed by skipping lunch, never going out, getting books from the library (queueing early morning if I had to) etc. BUT I loved uni, enjoyed my course, and knew it was only for a few years.
That is NOT the same thing as relentless poverty. Relentless poverty is when you get up early, scrape together breakfast, get the kids to school knowing they'll be hungry later, get 2 buses to work (which takes 45 minutes) because you can't afford a car, but you don't have time to walk (because then you'd have to put the kids into school breakfast club at an extra £2 per day). You work an 8-hour shift at a minimum-wage job, get 2 buses home (which takes over an hour because it's rush hour now), so you've been out of the house from 8am - 7pm, you collect the kids from your sister/mum/friend or whoever offered to have them that day, and you still need to do homework and make dinner and do some laundry, and you finally sit down exhausted after 9pm. Kids are whiny because they're tired and hungry and can't go to the school disco/ Sam's party because you can't afford to get them there, let alone buying them something to wear or a present for Sam (you can't regift stuff because you don't have storage space to hide things from the kids, so everything's been opened).
At the weekend you have to drag the kids to the supermarket (you need them to help you carry the stuff home on the bus), do all the stuff that you need to keep life running etc.
You don't have time, headspace or money for hobbies or exercise. You don't want to go out with friends as that costs money, you don't want to invite friends round because your house isn't that nice. You constantly feel guilty that you're not feeding the kids properly or spending enough time with them, and you know that tomorrow, next week and next month are going to be exactly the same.
Even something like a cookery class seems impossible because you'd have to pay bus fares to get there and back, plus it's only on in the evenings and you're too knackered and don't have childcare (they run a crèche but firstly that means paying the kids' bus fares too, plus by the time it's over and you get the bus home the kids would be exhausted and whiny and falling asleep in school).
The only person who's ever glad to see you is the dog, so I can see why you'd want to keep him around, too.