As Steven Malanga demonstrates in this article: City Journal Autumn 2004 | The Myth of the Working Poor by Steven Malanga
If you work hard and don't blow it on drugs or other bad choices the evidence is that you will no longer be poor even if you have only a high school education and no particular skills. The American dream is alive and well, but the left doesn't like it. Why? Probably so they can live in style while sneering at the people whose tax money they live off in the guise of government programs to help the poor.