Here's my take on it, off the top of my head. If you work on a farm and get up at 4 a.m. and do hard physical labor for the next 12 hours or so, then maybe, maybe, you are "entitled" to eat more. But, as rockinrobin and others have said, it's because you're entitled to be healthy,
not because you have been a good girl or boy and get a reward.
I was trying to make the point in another thread that the "treat mentality" is probably one of the biggest downfalls of people trying to lose and to maintain. Linking food with good behavior, getting through the work day, fun, and so on is a recipe for disaster for people who have a weight problem. (And that includes maintainers.)
I'm not saying that food shouldn't be enjoyable--that we only eat to live. Obviously there is room for delicious food in one's plan. But that has nothing to do with "deserving" to eat some food! I have to shake my head when someone says they had a "treat meal" at a junky fast food place. Why? Why??
Jay