I’ve never said that Leavers and Takers can be distinguished by the way they get their food. They can be distinguished by what they DO with their food.
Among Leaver peoples, food is free for the taking. Takers keep it under lock and key so that you have to work for it.
The obsession to preserve bodies is found only among Takers, it’s true, but not all Taker peoples are obsessed about it. Many Taker peoples bury their dead with no more preservatives than Leaver peoples, so I don’t see this as a way of distinguishing Leavers from Takers.