Have you ever worked on a challenging project of your own just to satisfy your own interest. How much did you pay yourself?
Paradoxially people work harder on what they do for free. Not because it's free, but because they are choosing the work of their own volition. In fact we even pay other people to create challenging work for us. Ever done a crossword puzzle? Lifted weights at a gym?
The problem we have here is that there is overlap. We aren't factory workers. Most people on this board could land a cushy in-house IT-Admin job rather than run on the development treadmill, but they refuse. Instead they deliberately seek jobs that demand everything from them. Why?
There are similar issues in other fields. Attorneys work long hours, secretaries don't. Bankers work long hours, tellers don't.