All living things possess a form of spiritual energy called reishi. This energy is used by humans to fuel their magical spells, but is also necessary for life to continue. There is a ritual that removes the reishi from an individual through a human sacrifice. The reishi is drawn from the body and transferred to special containers made to store spirit energy, while the victim's soul passes on.
In some socities, this ritual is reserved for ciminals, slaves or people captured in war. In others, it is a voluntary honor to give your life in order for your energy to be put to future use, and families of the victim are held in high esteem or receive some compensation. My problem with this system is that it can be taken advantage of by the higher standing society members who are likely to promote this to the destitute. People who are looking to get out of debt or poor folks who want to secure stability for their families would look to this as a final solution. Ultimately, it would devolve similarly to indulgences, and seen as a get out of jail free card and remove any integrity of the practice?
Human sacrifice should be an act of honor and not of desperation. I want to design a way that prevents this from being marketed to the disadvantaged, but keeps it as a limited, voluntary honor that regular citizens use. How can I accomplish this?