Now most people think work is sitting as a desk thinking and doing paper work. The fact is the work that you are actually doing is not the work that you think you are doing. The work is moving the pencil across the page now what you though of in your head. Work is force times displacement. That has nothing to do with brain power. Construction is work we tend to think is doing less work then say a CEO of a big compony. This in face is not true, the construction worker is using more for and moving things more places then a CEO would ever do. They just sign papers and hold meetings. The fact of the matter is, we seem to pay less for doing more work in terms of physics then we do just sitting around.