Yep, I too came from a poor background, went to university, then became quite successful and left that economic bracket behind. I work in software and security engineering, and coupled with good investments am in a very solid financial position. I have also spent a good chunk of the last decade studying and learning about the root causes of poverty and it largely cured me of my "I pulled myself up by my bootstraps" mentality I had as I started to escape from the mess that my childhood was.

I've been poor, too (spent years in my youth in a family on public assistance and in public housing.)

I too got an education (mostly in public policy), now work in software, and am now in far better socioeconomic status.

I don't find the GP's description of the causes of poverty accurate -- or even internally consistent, nor do I see GP's background (or my own) as some kind of privileged position to comment on the issue from.