oh for pete's sake @ all the "we don't do santa" moms. then why are you answering a question about santa? stay up on your pedestal next time...sheesh. everybody's gotta jump in when they think they're going to get to show how superior they are. yeah i've done it too. but it's still annoying.
i think that in our household growing up, we all knew that santa had about the same budget as mom lol. we didn't ask for huge extravagant gifts, because we were never that type of family. i think there were one or two times that similar discussions came up, and there were answers like, "i bet santa didn't have room for that on his sleigh," or "santa knew we didn't have room for that," or, "santa knew it wouldn't be fair to give you X, when little sister had asked for Y, so he got you something that would be fair." kids, of course, CAN be spoiled ungrateful brats (some more than others, i'm sure you know your kids better than any of us), but mostly they are pretty sweet little creatures. surely they won't spend too much time whining when they see all the fabulous presents they DID get.
and yes i have been talking to my son about gratitude lately. it seems we are going through a "rough patch" (growth spurt? reaction to stress that my husband and i are going through?) and his behavior is suffering...he's only 5 so he can't really help it all the time...so he gets down on himself and decides that santa will never bring him anything because he's being so naughty lately...so that turns into, "I DON'T WANT ANY PRESENTS! I HATE PRESENTS!" he just had a birthday, so that is a great opportunity to talk about being grateful for what you are given. these discussions are priceless, imo.