Why the Pope can't be an organ donor.

For one thing: "his body belongs to the entire Church and must be buried intact." But:

Furthermore, if papal organs were donated, they would become relics in other bodies if he were eventually made a saint.

I don't know enough Catholic theology to understand what's wrong with a saint's relic functioning in someone else's body. Saints are supposed to help us out only in ways that that are unachievable by ordinary dead people?