This sounds outrageous. Any time CP (or Bellagio or Aria) has picked up my food and bev no tax is charged.

Perhaps if you use RCs this happens but when they comp your food on the back end this does NOT happen.

Any decent player staying at CP should cash in all reward credits for free play or merchandise before checking out, knowing that the host will wipe out the food and bev charges. If you carry a rewards credit balance they force you use those before any discretionary comps can be applied.