re: Businessmen don't want to run the economy.
I wasn't clear enough. The term "in charge" is ridiculous to start with. The point of a free market system is that, as much as is possible in the real world, NOBODY is "in charge" of the economy.
It's weird. People have no problem comprehending a stable rain forest environment comprised of millions of organisms whose only purpose is to destroy all competitors in their niche and increase their numbers. Yet they can't believe you can have an economy of human beings without some omnipotent leadership--also comprised of fallible and corruptible human beings--running everything.
Pray to God you never end up in a society totally controlled by scientists. Knowledge is not the same thing as wisdom.