My family was 'lower middle class' growing up. When I was very young I remember my parents buying me a G.I. Joe every now and then when they went to walmart. I remember it taking all year for me to save up $65 for a video game [that would sell for $1.00 in the app store now].
When I was 17, my folks let me start driving my mom's old car. I have cerebral palsy, so I couldn't work most minimum wage jobs, but I did get a job at the local power company office. My supervisor was very kind. He showed me how the local power system was managed, and it was very interesting.
When I turned 18, I started receiving disability, which amounted to a grand total of $580 / mo. I saved what I could, because I knew I'd have to get a 'new' car before heading off to college, as mine was just about old enough to get it's own drivers licence.
I had all of $610 / mo. for living expenses. Even accounting for roomates [and neighbors that kept me up all night], I only had about $3 / day for food (Thank goodness my mom sent me leftovers from time to time). I knew that even if I was ok with the way I was living, no woman would ever be. I often wonder if all the folks that constantly bash those on welfare have any conception of just how little they live on? I knew I could not go on 'living' like that.
I enrolled in college, and thankfully, I managed to get enough grants and scholarships to pay my way. About half way through college, I got a 'real job'. First as a software tester, then as a programmer making real money [$17/hr!].
I don't think you can overstate this. Going from real grinding poverty to a job that pays more than the bare minimum every month was WONDERFUL. Of course, I was 'off' disability, but for the first time I had a little extra income, and was so nice not to worry about every penny I spent.
Of course, by then I was frugal by nature, so I started saving what I could, reassuring myself I would never go back to that life. To date, my income has expanded roughly 10x, and my living expenses 2x. I save over half my income, and likely will continue to do so until I can support myself with a ~3% SWR. I don't know what I'll do when I hit that point, but that's ok. I have about a decade to figure it out.