Fist of all, we all have a dream job, but, some get their dream job, others end up working unhappy jobs. Happiness and job satisfaction is very essential. What is the point of working and earning more money, where you don't enjoy your work. Money is not always an important thing in life.
For instance, i used to work in night shifts for a multinational company just for money. I didn't enjoy working because it was not my dream job, there was not much creativity to develop my ideas, and also i spoiled my health.