This is meant as a joke.
Father: I want you to marry a girl of my choice.
Son: I will choose my own bride!
Father: But the girl is Bill Gates daughter.
Son: Well, in that case…OK
The Father approaches Mr Bill Gates.
Father: I have a husband for your daughter
Bill Gates: But my daughter is too young to marry!
Father: But this young man is a vice-president of the World Bank
Bill Gates: Ah, in that case… OK
Lastly Father goes to see the president of the World Bank.
Father: I have a young man to be recommended as a vice-president.
President: But I already have more vice- presidents than I need!
Father:But this young man is Bill Gates son-in-law.
President: Ah, in that case… OK
Disclaimer Liability: This may works in practise.