I was about to comment “When one of my players asks whether they can do something completely unreasonable I look at them, roll a D20 openly on the table and without checking the result, say ‘no’”
Actually, saying no is one of weakness, so the PC wanting to do something completly unreasonable led to some pretty great player driven session or even campaign arc.
I just ask them how do you plan to do-it and suddenly the non reasonable plan becomes a suite of small reasonable tasks so I want the peace in the world, it's easy just give the love drug to world leader and they will all start to love each others, so first step is to put my hand in enough drug, the second is to get access to the water factory that will provide water at the next diplomatic summit, do you think the militaro industrial complex will be happy with this terrorist action ? OK that one is a bit extreme but you get the point, suddently the PC are the one writing the campaign and it's pretty cool.
Classic billionaire were pushing for low tax, and low gouvernement spending, so they don't give their money to the government. Musk is more the banana republic type billionaire, who is in favour of high taxes and government spending going in his pocket. As easy as it