I did mention Defense and other science projects. 2 things that are mostly publically funded, although morally I don't see where the difference lies. If you believe in a kind of Peter Singer redistribution of wealth then why stop at public money.

But I'm willing to bet that if SpaceX or whoever ever do become fully self-sustaining, a large proportion of people will continue to view space technology as frivolous and unnecessary toys for rich people, instead of valuable research and development that helps everyone.