Such a nonprofit exists, it's called the federal government.
Maybe the super-rich can create their own nonprofit to fund commercial space tourism or whatever absurdity they've deemed so important that it needs spending elsewhere to be cut and diverted to them.
The government has proven to be extremely inefficient at managing our money. Look at how little they care about the trails. If we want actual money to go places we care about we have to do it ourselves.
We can hold non profits accountable in ways that we can't with the government. Accountability in government takes 4-6 years when we get an election cycle. If a non profit is mismanaging funds it takes 4-6 minutes for me to give my money to a different non profit.
Maybe the super-rich can create their own nonprofit to fund commercial space tourism or whatever absurdity they've deemed so important that it needs spending elsewhere to be cut and diverted to them.