Giant lib hot take, but I think Jeff Bezos could save the world if he wanted to, he just doesn't want to. Imagine what $1 billion / year, $10 billion / year in climate change propaganda could do, either coming come Jeff Bezos or a thousand think tanks that he launders it thru. He could "hire" entire chunks of the work force to "work from home" (aka strike). He could set up Amazon to distribute food and supplies to people in the third world that are currently being exploited. A few careful steps and he could liquefy his holdings or switch them to "green" technology. He could fund a dozen or hundreds of politicians to run on something like the Green New Deal. He could actually affect change and dismantle the system, at least put a massive, massive dent into it.

Of course, he would never do any of these things. He either believes he will survive climate change with his money, that it actually isn't a thing (very unlikely; even the oil industry knew), or that he is old enough that it won't affect him directly. The fact that billions will die couldn't matter less to him.