Does following faith guarantee getting rid of troubles?

> And if only they had upheld [the law of] the Torah, the Gospel, and > what has been revealed to them from their Lord [i.e., the Quran], they > would have consumed [provision] from above them and from beneath their > feet. Among them are a moderate [i.e., acceptable] community, but many > of them – evil is that which they do. ([Al-Ma'idah \[5\] : 66][1] ) Does this verse mean that following the right faith gives a person the benefits of this world? But then why do disasters happen to Muslims, as well as to other people? And why are there rich Jews and Christians? For example, the wars in Iraq, Syria and Afghanistan. Maybe it's because of sins?