How much money is currently required to mitigate possible risks from AI (to be instrumental in maximizing your personal long-term goals, e.g. surviving this century), less/no more/little more/much more/vastly more?

May I suggest rephrasing the last set of options? It smells a bit... loaded, to balance 'less' against 'little more', 'much more', and 'vastly more'.

Expert 5: Interesting questions, I'll enjoy seeing your published results! Unfortunately, now that I work at * (through the acquisition of one of my companies, *), there are policies in place that prohibit me from participating in this kind of exercise.

Could suggest he write down his answers in private and in X years or whenever he stops working at Y, he could send them.