I do not disagree with you, but I see no precedence for a set formula to set up an "islamic" state. The first state too took basic predefined principles that were ordained in the Quran and set as a perfect example by the Prophet based on the conditions of his time, and the rest followed suit. The election of the Caliph for e.g. had a lot of similarities in the electing of a Tribal Chieftain because that was the system that Islam came into, not the system Islam was supposed to remain in.
What is required is a cleansing of our own personal selves via a return to the basics and actual dedication to Prayers, Fasting understanding of Quran and Sunnah.. instead of starting out with the complete entrails of Islamic history in caliphate and collective statehood.
Only if you are actually able to fix the situation in society will leaders automatically emerge. Trying to force one brand or the other via a state action will only lead to the same issues as we face today.