The enforced scarcity in the market is what makes sure the money is always enough to prevent you from relaxing. Imagine doctors were as common as McDonald's managers. At the margin doctors would frequently be taking a slight cut in pay to do something fun like sports medicine. Now imagine there was only one doctor in the world. Even if he longed to relax and do pharmacy, ailing kings would offer him mountains of gold until he almost had no choice but to see them.