Don't know if this is your opinion or if you're just stating a fact about others, but that is some selfish social pariah thinking right there. "Fuck you, I've got mine". Unfortunately, that's what seems to go through many rich people's minds.
So, at some stage you might be comfortable with the conditions agreed, but you might also get to another stage of your life, when it is not comfortable anymore - thus you start seeking better deals.
There is nothing bad or evil in this.
For some people it is 20% and for others - 75%.
And be more than happy to pay high taxes.