A world in which the memory of a person imbues that person with strength or after death the inequalities are preserved is one where canonization directly benefits the ego of a soul and goods are transferred to the spirit world in material death ceremonies.
One metaphysical question is whether the souls in the world of death are existing based on the memory of living people or the historical record? There is no person alive that has a memory of another person that was born over 250 years ago. If this were the case, a person reaching their 125 year would have to remember meeting someone that was 125.
If it is also the case that a person is imbued with power based only on the reproduction of images of that person and the viewing of that person, then figures in the mass media are extra powerful. However, if it is only through the memory of the person & a personal connection, although the number of people that have heard about a person are great, the actual psychic energy that imbues them with strength is much weaker.
The custom of remembrance in the mind and memorials both make up the economy of health and wealth in the underworld.
Scoundrels that have stolen the works of other reap the benefits of this also in the afterlife and deprive those bereft souls of safety and comforts. Even in the afterlife people are consumed by the idea of meeting and paying attention to their idols, entertainers. In the absence of bodily need, entertainment & past times, like singing, dancing & gambling make up the prime activities. Certain activities like running a plant or electrical or water system make no sense in the immaterial world unless the immaterial world is more like a plane of second life and comparable to the material world in the needs of its inhabitants.
Justice is eventually had for the musician that had his songs stolen as the events were not sealed at death but played out in a drama where that information is passed back to the world of the living, leading to a contestation and rewriting of history in the material world. This feeds back into the immaterial world and futures change. A person who was boosted by idolization is then rebuffed by all his fans.
A person is remembered by their contribution to humanity and their family & friends. The result of this in the soul world is a society of celebrity. Given a chance to read a well-known author and an unknown one, a person will choose the well-known one even if this monopoly produces suffering from a lack of remembrance. As a networked phenomenon, the unknowns drop out, and the knowns spread through the reproductions of their work. There is suffering in the afterlife, not only from regret by souls, but in that not more is known of the people in the past by the living. This is one conclusion.
There is a theoretical possibility that a soul has memories of the past world and that his relatives exist at a deeper layer not accessible. Otherwise if all the people existed in the soul world layer 1, a single household might contain a multitude. Although it is possible also that they just live somewhere else. The Greek philosophers only speaking ancient greek have walled off in a replica. If not for the possibility of isolation and travel, the soul world would be a celebrity driven oligarchy, possibly a totalitarian state where food from offerings is doled out to weak and unknown souls for their services, their passive income a fraction, an offering only once in a while or not at all.
These are some theoretical metaphysical considerations to the problems of memory or attention as a fungible thing that plays a substantial role in an unseen layer of existence.