Me: Grew up fairly poor - by US, "white" standards anyway. I don't consider myself a manual laborer but certainly - proudly! - consider myself working-class. Again: by US, "white" standards as by world standards the vast majority of us here are likely to be extremely privileged financially. I did not complete high school (fairly proud of that too) and have only had a minimal amount of college level education. That said, I work in a semi-professional medical / social work job where the majority of my co-workers have bachelors degrees - I still get paid the same!
As for "ambition" - I aim high! I work to be happy, healthy & to leave the world a better place as a result of my time here. The size of my paycheck is NOT a primary consideration for me, particularly if/when increased pay means less time to enjoy the people & activities I care about, or involves greater ethical compromise.
I meet/know vegans from a wide variety of socio-economic backgrounds & present jobs.