Do Managers play a major role in causing attrition?

If you're losing good people, look to their immediate supervisor. More than any other single reason, he is the reason people stay and thrive in an organization. And he's the reason why they quit, taking their knowledge, experience and contacts with them. Often, straight to the competition. "People leave managers not companies," write the authors Marcus Buckingham and Curt Coffman. "

But i would like to cite an exception. Indians constitute a major chunk of the workforce (both blue collar and white collar) in Gulf Countries. In the past, blue collar workers have been the majority but over the past few years, the percentage of white collar workers have gone up. Many of the people work under tyrannical supervisors or managers but still they stick with the same employer for years. For them, compensation is the only priority and they are willing to undergo any hardship. So why is there an aberration? I invite readers to give their comments..