This seems to be a return to some very old models of research- think Aristotle, Leonardo Da Vinci, where research was not government supported, but either the hobby of the very rich, or the very rich paying someone. I suppose that it could be considered as government supported, as the very rich *were* the government. The institutional government supporting research appears to be a 19th or 20th century change, and that is dominated by military motives.
The super rich have more money than they could possibly spend- why not let them spend that money in the way that they want? Be it driven by guilt or by the desire to make more money... I'd much rather them spend the money on science as opposed to spending their money on becoming part of the government (think Mitt Romney and Michael Bloomberg in the US and Silvio Berlusconi in Italy).