"Sparrow or swallow can not understand the will of swan". Big things need big money. The aspiration and value of people who stop taking challenges because of little money and of people who make big revolution that need billions or trillions dollars in order to increase everybody's happiness are pretty different. The wall that need to be knocked down is different. Latter one will devote to the mission. And the "Why" is not something can be cultivated. Only with good motivation one can earn real big money.