There doesn't have to be a lot of waste with a turkey. Never fancied a crown as I find them dry. When we were young, my Mum would cook the turkey, then we would have it cold the next day. Then maybe some would be used in a salad (my aunty always used to make turkey rissoles at that point) and eventually the remains would be made into soup. Nowadays, people can't be bothered to do that. I have a friend who cooks a chicken and after the meal, bins the leftovers even though there is plenty of meat still left on it.