>> Why do you think wealthy and high income people fight so hard against repaying the society that educated them and provided the infrastructure to allow their business to flourish?

Sorry, but I'm not seeing it. Here is a list of the Giving Pledgers: https://en.wikipedia.org/wiki/Category:Giving_Pledgers.

They have all committed to giving more than half of their wealth to charity. 5 of the 10 richest Americans are on that list. It amounts to around $1.2 trillion.