Perhaps a post-HM government can do something about it - now that there will be one.
That $50 billion number seems to have been fished out of thin air. IIRC, the US government estimates his fortune at closer to $2 billion. Large, yes, but not at the same level.
Seriously? To me, the difference between $2B and $50B seems like diminishing returns (http://en.wikipedia.org/wiki/Diminishing_returns). If you disagree, then I'd like to be you for a few days... ;-)
For a person, yes - there's little you can't do with $2B that you can do with $50B. For a country, though, it's the difference between a single shuttle launch and three years of NASA's budget.
That makes me wonder though - he and many other rulers (I'm guessing) have amassed billions but are hush about it, so there's no telling who is funneling money and how much of it. It would be nice if Forbes added these rulers to their wealthiest people in the world lists.