I understand your curiosity. Don't forget that even if someone works hard or not, all these materialistic success come form Allah the almighty alone. His/her success is NOT because he/she worked hard, its the Mercy of Allah Ta'ala(but that does not justify us not working for it-refer the hadith of tying the camel) . Also when Muslims turn away from Islam, success is given to others. Sometimes even if we are good Muslims, success in this world is given to the disbelievers. Its answered by Allah Ta'ala in the Quran. 1. "So let not their (disbelievers and hypocrites) wealth or their children amaze you; in reality Allâh’s Plan is to punish them with these things in the life of the this world, and that their souls shall depart (die) while they are disbelievers." (Qur’an 9:55) So its imminent that the non-muslims will be successful in this world, because its a test for us Muslims. So that we understand Dunya is theirs and Akhirah is ours. May Allah make us from the Sabireen. ameen.