Actually, the idea that important people would be raised from the dead threatens my versimlitude. In fact, by law in most of my world it's illegal to raise an 'important person' from the dead in most cases. Once you are dead, threatening the natural order of the world by bringing you back tends to cause way too many problems.
For example, suppose you have a situation where a King is killed. At that point, his 40 year old son is now the lawful king after having waited to obtain the throne for many years. If you raise the king back to life, does his son cease to be king and must he now keep waiting? Is it possible to have reverse succession? Can a king be uncrowned? Can you have two lawful kings? Will now the son resent the father, or if resentment is already present, will it be increased? Will the father even want to be returned to life, seeing as he must now supplant his son? Suppose the son and the king were not of like mind and desired to follow very different policies, and to place very different advisors in high station? Won't there be immediate conflict between the son and the father, and between the supporters of the two administrations?
In the history of my world, there have been way too many feuds and civil wars that came about in centuries past because someone decided to ressurect a dead prince. Brother vs. brother, father vs. son, even in cases that before the death the two had held a loving and respectful relationship. Brothers have agreed to have their older sibling raised and restored to the successsion, only to become resentful when they see the policies the brothers put in place and regret it. Thousands of people have died just so someone could have a few more years of mortal life. At some point, society said, "It's not worth it." In general, it's illegal by law and custom to raise a person from the dead if they have an adult heir unless the adult heir is the one guilty of the murder. And in general, everyone has to want the dead person back before the priests will attempt it. Family members are interviewed privately before a decision is made, consultations are made with the divine, and only then is raise the dead person considered.
Further to that, there are lots of reasons why a dead person might not want to come back to life. In general, most NPCs don't have a mortal destiny that they will deem worth it to come back for. PCs are among the most common sorts that are actually raised because they usually have destinies to fulfill and no heirs or other entanglements complicating things.