Given the history of these nations and cultures it is going to take a long time. Japan became a Constitutional Monarchy and Singapore has definitely become a very Capitalist Free market enclave. Likewise in the Middle east there is a very strong trader tradition but the Islamic prohibition on interest and teh Koranic implication that government should be theocratic in nature and enforce Islamic law also get in the way.
I for one, do not think it is worth it for the US to commit resources, and most important, lives, to make sure ragheads know how to govern themselves. It's a huge, long-term proposition, expensive in terms of lives (and money) and not worth it.
I would also submit (and risk the wrath of the continually offended) that the Oriental mindset, culture and work ethic are more conducive to representative government than the Middle Eastern.