Some of this could also be said (at a much smaller scale per person) about people in rich countries in general. Humans have trouble to care about far away consequences of their (in)actions.
Some of the behaviour stems from their situation itself.
Some of the behaviour stems from their situation itself.
The huge difference here is that for these billionaires, everybody else is a "far away consequence". It's as if I kept tossing my garbage into my direct neighbor's window and flushing my toilet into their kitchen sink.