Certainly you have a point, I could be more informed on the theory. But I don't think that's all what matters. What reads in the Quran and how it's interpreted,

Certainly you have a point, I could be more informed on the theory. But I don't think that's all what matters. What reads in the Quran and how it's interpreted, and put into practice in different societies, countries and sects are two different things. For example, the Gulf-states would easily have the money to build the most well-being and equal welfare states in the world, if they so wished. Yet they haven't done it, which leads me to believe that no religion will overcome natural selfishness of people. All religions teach their followers to show compassion towards the less fortunate of their society - and societies of all religions regularly fail to do this. Ideologies shouldn't be judged solely based on teachings, but also what actually happens. If there was an exceptionally good religion, it should deliver exceptionally good results. Religion and income inequality seem to have little correlation, which leads to a conclusion that they're all equally useful or useless in this practical aspect, no matter what other differences they may have.