Is this a good thing? Governing is at its essence people management, and the best scientists don't always make the best managers. They may not be persuasive enough to rally others to their cause, or see the importance in doing so, or understand the give-and-take of politics, just the crusade for "truth." A scientist may be better and smarter, but impotent and walked over if he can't actually do politics with other messy humans.
> I am obliged to confess I should sooner live in a society governed by the first two thousand names in the Boston telephone directory than in a society governed by the two thousand faculty members of Harvard University.