Why are all people running behind money and not knowledge?

Three university professors were sitting in a room and a genie appeared.

He asked one of the professors. “I give you three choices. You can be the most powerful person or the richest person or the most knowledgeable person in the world. Choose one.

The professor thought for a moment and said “I want to be the most knowledgeable person in the world.”

The genie snapped his fingers. Immediately there was a halo around the face of that professor. The other two professors were stunned. One of them whispered “Say something wise to us.”

The most knowledgeable person whimpered “I should have asked for money.”