Income lessons not taught in school

This statement ( title ) had always been mentioned in Robert T Kiyosaki’s books and speeches. Why are we dependent on income and wealth to survive but we are not taught that in school? Yet, we have to learn trigonometry, integration and differentiation when most hardly even use them? Read this before it is too late.

 

https://sg.finance.yahoo.com/news/4-important-income-lessons-don-160000358.html