Yes, they do. Poverty creates desperation. They also have less to gain. Most any billionaire likely understands that earning a few more billion will not change their life that much.
I can’t disagree about people living at or below poverty line, even from the materialistic view. The average HN reader, though? Philosophically, I believe what I wrote is generally true. Having a bunch of money isn’t going to change how happy someone is. You aren’t any freer. You are still bound by the human condition like everyone else.