As Einstein's fame within the scientific community grew, offers for new, better positions began to pour in. Within only a few years, Einstein worked at the University of Zurich (Switzerland), then the German University in Prague (Czech Republic), and then back to Zurich for the Polytechnic Institute."
At any rate, Einstein I'm sure you'll agree was a notable exception, rather then the rule.
And I'm sure you'll also agree that this forum does not have any other exceptions to the rule.