I’d love questions like that. Not that I have a kid.
One approach is asking her what she thinks, or if she can guess. Can be split into whether she knows why he is so wealthy.
Being concrete should make it pretty clear. You get paid what you get paid. And that’s that.
And that’s a great opportunity to talk about how wealth does not correlate with value or commitment or investment or ethics.
“What happens when you die” - I assume you mean after you die (not during), and to your consciousness, your awareness rather than your body.
The same as before you came to be. Not like you fell asleep; you’re gone.