I'd teach them 2 rules:
Rule 1- Don'r be poor.
Rule 2- Always follow Rule #1.
I am pretty sure Warren Buffett told something similar also. Considering that he made a fortune simply by following these two basic rules, I think I am on the right path.
You are forgetting the golden rule; come from rich family. I mean it has been tested and yes there are some people who didn't follow your rule number one, but majority of the rich people come from rich parents.
Jeff Bezos? Got 250k in 90's (which was a huge amount in today's money) and then managed to survive nearly 10-15 or even 20 years without pocketing a single dollar from it to himself. Would you be able to get 250k money today let alone 30 years ago to start a business for free (not a loan, just given) and then survive 20 years without earning a single dollar? Because, if you can, then it means you could start a business like amazon today!
Not to mention, that born-rich people do have a lot of money to burn to experiment on whichever business that really sells and has a long term profit.
Well, we all have different definitions of what a "rich" person or how much would a rich person must possess, like luxuries and businesses.
But, when you're starting from a scratch, only a small percentage of people who tried to be extremely rich has succeeded.