PS: These numbers get crazy. I know a couple that has a little under 20 million, but don't quite think they have made it based on who they hang out with. And honestly there goals don’t seem that ridiculous. ~200k each after inflation from a diversified and conservative portfolio which will just snowball takes a lot more now than you might think.
In fact, there are probably legitimately influential people that wield more power than those much richer to them. One need only look at political "movements" to see that they're not always run by the rich and powerful. But rather, by those that can get large amounts of individual/normal people to agree with them and follow through. The oratorical figures, I'd say.
He has been saying (and publishing tax returns to show it) that he doesn't own any shares any more. And even when he did the amounts being talked about are in the hundreds of thousands range. Was there some new revelation in the past 24 hours that revealed Cameron to be a secret millionaire?