Why need Consultant?

Consultant is really important occupation. An organization needs consultant to solve problems. So a consultant must know a lot in some specific fields. As I know, there is my lab friend, Sofi, who wants to be a consultant in the future. It has no doubt that she is definitely qualified. She is a nice, well-knowledged, and intelligent person I have never met. She works hard, but never complains. She treats everything so serious that she will be fooled around sometimes. Although she looks like Chinese, she can not speak chinese at all. She has Chinese feature, which means she is very humble and polite. Oh, why do I keep introducing Sofi? Because she is only person I know who is going to be a consultant. A good consultant can save a lot of money and lower the risk for the company. Besides, consultant can earn much money. Why not have the dream to be a consultant? like Sofi ;)