Why some people work hard and others earn much? Interesting question. All the time our parents repeat us the same thing: you must study hard to find a good work and earn enough. And always there are people who are very clever, educated, work hard and nevertheless earn few. The answer in my opinion lies in modern society: it's imperfect. People who have an authority, a power to influence society are imperfect. I'm imperfect. And everyone pulls the blanket over himself. That's why doctors and teachers in some countries earn less than retailers. So working hard is not the only condition and a sine qua non to earn good money. You must choose right sphere in right place with right people and then the harder you work the more you get (but it's not a guarantee too :).