It’s a comforting thought, to believe destroying the world is their goal.
But no. In truth they simply don’t think about it. Their path to the power and resources that would save them and theirs from the world’s destruction might hasten that destruction. But that doesn’t matter. It’s easier for them to simply not think about it. They’re going to have everything they need to live a comfortable life, no matter the environment it brings about. They’re going to be fine.
What happens to the rest of us? It’s not even that they don’t care. We don’t matter enough for them to not care about us. We matter so little, our future doesn’t even occur to them.
It’s not evil. It’s apathy.
I’m not sure which is worse.
That all depends on the specifics of “good pay”. I guarantee there is some amount of money that I’ll accept to do practicaly any job. That may be far more than “good” though.