Let's assume for a moment that "scraping by" is minimum wage, which here, is $7.50/hour. If you work 40 hours a week every week for a year, which most people do, you're making $14,400 per year. Or, $1,200 a month.
That's what I live on right now. $1,200 per month. And I live well. I have a nice, comportable apartment, and this amount covers rent, water, electricity, internet, and MUCH MORE! I have enough money to do whatever or buy whatever I care to without "really" worrying about it. As a matter of fact, I've been too lazy to go grocery shopping this month and I've been eating almost nothing but fast food each day-- and I pay for my girlfriend every time. And I STILL have money at the end of the month. If I weren't that extravagant, I could probably pay car payments and insurance and all that, with just enough left over "just in case."
If scraping by is minimum wage, it would be doable to live like that your whole life. (In this magical realm where you somehow cannot progress to a better job. Again, I just cannot see not making my situation better.)
Chibibar's scraping by, however, sounds pretty bad.