I didn't really bring up rich vs not rich, because it's more about empathetic vs narcissistic or societal vs anti-social. The event of a catastrophic climate collapse that you describe is probably not going to happen in our lifetimes, so if you're of the anti-social mindset, what do you care what happens to the Earth or society at large, especially after you're gone? Some people aren't going to change their behavior for the benefit of people they'll never even meet (separated by space or time), let alone never care about.