No perfect political systems

Comments on Philip Stephens “A clean sweep of political disillusion”, 17/12/2011, http://www.businessspectator.com.au/bs.nsf/Article/Arab-Spring-Middle-East-democracy-euro-debt-crisis-pd20111216-PL2EU?OpenDocument&src=sph&src=rot
I think the point is clear, that no political system is perfect.
There is, however, a strong advantage in democratic political system to have the choice to mask its failures while dictatorship and authoritarian systems can't if the people have the ability to part with their systems.
In a democratic system, if a government fails then it may be voted out of office and replaced with a different government whether the new government is better or not is another question.
That is the way and a success way to mask failures of the system if it doesn't work.
In a dictatorship system, people may think a change of the system will solve all problems, so they can bring revolutions to overthrow the system. Again, whether the new system will be better in solving those problems or not is a totally different question.