wasting you seem to be getting an un-necessarily harsh time about this. (Admittedly i have only read about 3/4s of the thread). However, there is several aspects to this:
Commericialisation
Lying
Encouraging Pretend and indulging in the believe of magic.
I totally agree with you on the fact that christmas has been commercialised beyond belief and that a lot of people focus on what they get rather then what they recieve. However, this can be changed with the correct influence. Your ds is still young he can believe it is what you give to be most import. We make a big fuss about ds chosing the present he give to me or his dad. And whilst we are separated and have little to do with each other we still make the effort with regards to presents for birthdays and christmas because it is a lovely surprise. Ds needless to say is bursting with christmas secrets as to what he has got each of us and has said on numerous occasions I can't wait til you get your christmas present... he is not the most sutble yet bless 
Yes he is looking for to getting presents but you don't hear much about what am i getting, or i want.
As for lying to children. I can think of few occassions where lying is acceptable. And those all include for the preservation and benefit of the child and its (be girl or boy) innocence. I don't agree.
Encouraging imagination: We do this a lot when they are younger. Oh are you pretending to be a fireman, Come on fireman sam why don't we go find a fire to put out... etc etc. This is healthy part of growing up. But consider this. How would you feel if you had a child that didn't pretend, didn't believe in god (and could justify it logically), and didn't believe in father christmas? Like ever? Tbh it is partially soul destroying but you know what despite having a child like this we still do stockings because it is a fun thing to do. He is under no illusion that a man comes down the chimney, he is under no illusions that anyone other then us make up the stocking and he loves every minute. It is an interesting compromise between his lack of belief and my wish to try to give him the magic i felt as a child. We do the whole game, but i feel cheated a bit, and he doesn't fully understand the magic.
Don't spoil something that lasts only a few years anyway, make it something that you want it to be
Stockings in this house, tooth brush, book, chocolate (not much but a bit), a few bits of stationary (age appropriate), notebook/diary, and a toy £2-3 worth. Total stocking about £10. Christmas present budget £10-15 for me/ex. Admittedly we spend a little more on ds but he often gets things he needs like clothes wrapped up for him to open. And you know what he loves the fact he gets a new jumper etc as much if not more then the toy some aunt bought him.
christmas is about making your own traditions I refused ex's tradition that santa brought everything. Now we have seperate christmas i shall be making a few more traditions. My christmas my way.
Stop worrying and enjoy. FC only lasts a decade at most. and in the bigger picture that is no time at all.