That would actually not be karma…karma has nothing to do with dead spirits. (btw karma=buddhism)
It would come from Chinese folk religion, which is OBSESSED with dead spirits, ghosts, gods, etc. (ghosts=Chinese folk religion)
All those people sweeping tombs and burning paper money so their papa and meemaw can pay rent in the afterlife? They aren’t doing that based on Buddhist teachings but on Chinese folk religion. (yah, some people sorta mix them, but those are the uneducated masses)
It may look all the same to someone who doesn’t know the difference, but to many of them (ie Taiwanese people), Jesus, Muhammad and Moses were all the same as well.
Just wanted to clarify…