Value of Experience. Tastes for Work preferences, satisfaction. In the long run, people usually find a job that fits their preferences. This is not to say that everyone working in the world today will end up in their preferred occupation, but in the long run, people will find a position that they can tolerate. Wage differences across markets can be linked to labor supply and labor demand.
Some jobs pay more than others because they require a long, costly training period.
This makes the supply of those individuals willing to go through the training fewer. The training that the individuals receive increases their productivity and that increases the demand for their skills. This lower supply of individuals coupled with the increased demand for their skills drives the wage up. Some individuals earn more because they are more able and more talented. Difference in Risk Jobs that have a higher probability of injury or death pay more.