On the Leadership-Management in Politics discussion

In Politics, a decade is an eternity

- M. Porter in his article " The Competitive Advantage of Nations "

Can - and Should - Leadership and Management of Nations combined into one function ? should our politicians be our 'leaders' ??? Aren't the two roles (politician & leader) inherently opposed to each other, and how to expect a regular politician who gains a strictly time-limited position by spending all his time doing the 'small stuff' and managing appearances or by rising through another irrelevant ladder to be able to provide sustainable vision and thought leadership ... ? Assuming that vision and thought leadership are important components of building a better future - the stuff of leadership.