I don't have a Scrooge per se, but I don have a DH who doesn't like to think much about christmas until about 2 weeks before. He will take the boxes out of the attic, but only when we are well into December (and if we are getting a real tree, can't do that too early either). He'll sort out the lights but lets me decorate the tree (even when I have put the decors on, I change things around, but he thinks that I don't approve of where he puts them - I don't, but I don't approve of my own either!!). He did go out a couple of years ago and buy a set of lights for outdoors, and he drapes those over a tree in the front garden (I am not allowed have any involvement except to admire the finished result).
I don't think he actually has a clue how much it costs to get all the presents - I do most of the shopping and budgeting (but I always stick well within my original baseline). And I get things over the year, and make things over the year, which cuts costs a lot. I put money away direct from my paycheck every fortnight all year, and this covers Christmas and also my summer holiday spending money every year, with some leftover.
I think he is used to me going nuts about Christmas (and a few other things too). He rolls his eyes and lets me get on with it, but enjoys the end results. (He thought I was a total fruitcake for getting an allotment for growing vegetables for example, but he has enjoyed helping there when he can and really enjoys the results on his dinnerplate!! :haha: ). As long as I don't expect him to get too involved, but arrange it so that when he moves past his work deadlines (it's usually a very busy period just before Christmas), there are things (jobs, shopping or whatever) that he can still do for or with me, and there are family outings we can go on without him having to knuckle under and tackle a laundry mountain or entertain the hordes before he has unwound a bit, then it works well for us.
And having the toddler has definitely made a difference as this year (she will be 3 just after Christmas), he has had a chat with Santa and arranged temporary storage of a large item in his mother's house (we will be just down the road this Christmas), as well as booking our holiday accomdation - neither of which were prompted by me!!