Liar.
Chances are that most of us could choose to make more, and we could choose to make less.
What galls me is self-proclaimed conservatives getting envious of someone who has chosen to make more. It's nothing but rank hypocrisy and class warfare.
And nobody has to work any "harder" than they choose to. People in ditches are there because they ditched school.
And what is generally true about any group cannot be rigidly applied to any one individual. This fellow may be the best teacher in the world for all you know.