Because Allah is the Almighty and all powers rest with him. On the other hand we have democracy - the democratic system based on the people which are commonly known as leaders . When they hold power they act as unanswerable to the public while they forget that the absolute authority rests only to the Creator of this universe. Taking our country under discussion the only period where one thinks that the country would really progress and prosper is the time when commoners would be given the chance to head their state as they have faced much and they know that which actions would make them achieve betterment.