> And that is one of the most disrespectful things I hear applied to low wage earners - that they are incapable of learning new skills, that they're not as capable as other workers or that they they're doomed in be in low wage jobs forever.

That's not what the GP said at all. Rather, their statement acknowledges that there are low age earning people who are capable. All they said is that the challenges of daily subsistence in a low-wage situation add a significant additional obstacle to gaining the skills and experience needed to get a higher paying job.