I question the whole premise. First of all, Phlosphr make a very bold claim, which is that if a good scientist ran the country we would A) not work on missile defense, B) strive for a worldwide government, C) forge a peace, and D) spend lots of money on scientific programs.
It sounds to me like you are taking your own personal political beliefs, treating them as gospel, and projecting them onto scientists. In other words, you’re saying, “A perfect leader would do all the things I think are right.”
The problem is, scientists do not fall lock-step into one political philosophy. Among scientists you’ll find plenty of conservatives, liberals, socialists, libertarians, you name it. The problems of government are deep and complex, and not amenable to scientific examination.
I’d MUCH rather have an economist in the White House, btw. At least they are actually trained to understand political issues.
For my money, scientists are just about the WORST people to have in public office. They tend to lack social skills, they tend to offer mechanized solutions to societal problems (which is why many are attracted to socialism, and why a LOT of scientists in the 20’s, 30’s, and 40’s were fans of Communism). They often fail or refuse to understand social forces that can take the best technocratic solution and turn it into a giant failure.
All I want in a politician is someone who understands what the average citizen has to go through, has a decent intellect, and a healthy dose of common sense. I’ll take a Ronald Reagan over a Jimmy Carter any time.