if you think islam can do this for you, more power to you. please follow oIslam and the book more and more and become a better human being…no problem whatsoever with that concept. at a personal level, you can do whatever you want to
but why to force your govt to make a constitution which shd be Islamic? why have a condition that your PM and President needs to be Muslim? why have sharia courts? why keep on harping that we need to be islamic republic of Pakistan? why keep on thinking and promoting that a society can only get better when we follow islam?
because remember there are millions of sikhs, Hindus, Christians also living in your country and who also adore the teachings of their religion and their religions are also teaching them to follow the truth, honesty & fairness in business dealings, tolerance, acceptance, introspection, patience, kindness towards all the mankind.. what if they start demanding that this shd be the Christian Republic of Pakistan? can you put yourself in their shoes for one second and think about it?