On the subject of necromancer obesity
The rise of necromancy was ultimately, the refutation of aristocracy against the emancipation of all. The dead need not be whipped, fed, watered, cared for, they do not run away nor do they rebel, they simply work to their master's will.
This gave the Cult of Rashtal an edge against the living, who demanded pay for their work and bickered amongst themselves. But lo, a thousand years later and the fruits of wicked endless slavery for the dead wrought a bigger waistline for their progeny.
Ye olden days birthed hardcore Rashtalites, the greatest and most loyal of whom were granted eternal life by the Empress. Their ideals were to end the eternal cycle of life consuming life, sustaining itself needlessly on the pain of others. The newer generations care little for that ideal. Indeed our existence at all a mere byproduct of not having achieved 'our' goal yet. My existence, simply of that to serve and die, and serve again.
So when our lives come from failure and lead to nothing but servitude, where else do we turn? I have known many, men and women, of great girth, and the Empress herself is festering mound of adipose. I too, have become obese. The pleasure of food is but one of the worldly ways we dull the pain of our existential crisis. After all, the dead are going to keep on working whether we eat or not, best get in our fun before we join them.
-Elizabeth Dorset's Memoirs, Circa 979