It's not a guarantee that the new one will be better - it's the guarantee that the new one will be not the old one :) . As an example, Boris Yeltsin was a different kind of a leader.
Of course, the idea is to prevent people from the same circle - with similar or worse ideas - to have the power. Robustly that's to be solved by the people of the country - who apparently suffer from lack of learning on the previous mistakes. Also, getting best solution takes longer time... to the initial results.
Of course, the idea is to prevent people from the same circle - with similar or worse ideas - to have the power. Robustly that's to be solved by the people of the country - who apparently suffer from lack of learning on the previous mistakes. Also, getting best solution takes longer time... to the initial results.