That’s fine - we just need to find a way to slow aging and wait until science advances. Strictly speaking we just need to find a way to keep our brains alive and stimulated, not the whole body.
Why can't I want both earning 1B and do good things for the world? Unless his diary directly contradicts what he has said in public (like "I don't care about money"), I see zero moral issues here.
Don’t you think a far bigger threat to democracy is that government allows this influence? And voters seem to be perfectly OK with both 250M campaign contributions and widespread lobbying?