A lot? Very hard to be a great leader without it, so it inevitably comes with a large halo effect.
More likely because they have money and people who work for them don't. "Charisma" comes from projecting power - some people are backed up by money which gives them required confidence and other people can fake the feeling of having such backup.
It comes down how great safety net given person has. If they know they can do anything, and they can pay their way even out of murder, then they will have the so called "charisma".
It is for the most part a necessary but not sufficient condition.
I don't think that's true. Lisa Su is a fantastic CEO but doesn't strike me as incredibly charismatic. That said, maybe it's a good thing...I'm not sure if semiconductors is the best industry for extroverts.