Us too, Santa only brings one gift. The rest is from us. Now that my daughter is 8 she just asked why some kids get lots of gifts from Santa and she gets only 1. I told her that I can buy her a lot of the things she wants so I tell Santa he only needs to bring them 1 gift and can give the extra gifts to kids whose moms and dads can't but them for them. So I just have to worry about getting them each their 2 santa gift, other than that if they don't get it I can explain it was too expensive, I couldn't find it, they already had something similar etc.
We do the opposite--pjs & a book from us, the rest from Santa. They don't get everything on their lists. But I use the excuse "WE would never buy you that much stuff..." Of course, kids are 15, 12 & 10...10YO still believes but figure we get one more year after this at best...

I used to get by for about $100/kid. I am struggling to stay under $200 this year...their lists are very short; but when each item runs $50+ OUCH! (it is KILLING DS15 that all his friends have COD Special Ops but he has to wait for Santa....)