The schochet (butcher) at the meat market probably gives the Rabbi a discount from what I have to pay. I do not see anything wrong with that. A lot of people give the Rabbis a discount, or even offer our services at no charge as a token of our appreciation and respect for them.
U.S. Catholics largely open to non-traditional families, Pew survey finds (DPA)
from the article: Attorney General Mazuz calls on Chief Rabbi Metzger to resign