Assume another world nearly identical to our own in technology. The only real difference between our world and this one is that that world is a cannibalistic one. There is no stigma around the consumption of it in this world, and the procurement of it is pretty regulated by human rights groups.
Assume that specialized health concerns from cannibalism, such as prion diseases, are not an issue, but the more general issues with eating other meats are present. (food poisoning, etc.)
Those who die, naturally or otherwise, are frequently sold to food processing companies by their families. The price of a dead body depends on the company purchasing it, along with the age and quality of meat, but for reference, a health 35 year old man sells for around $800. Naturally, this also creates a black market where unwilling "donors" find themselves being processed.
With all this in mind, what economic class would have more human flesh in their diets? And in addition, how might this change benefit (or harm) other economic classes.