Humans serve them well enough and relatively easy to control. Robot utopia is not guatanteed and have own risks.
And fortunatelly in a group of AI overlords everyone except of Musk is pretty sane.
They are all psychopaths, devoid of normal human emotions.
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.
They are far safer people compared to those who dont care about virtual wealth numbers.
For now. Throw in climate change, food shortages, war, mass migration, and suddenly the ratio becomes 25 million : 1 for starving, angry people vs billionaires, globally.
Or maybe they don't. Some of those are deeply afraid of society looking funny at them.