I've been thinking some more about all of this, and somehow got on to Christmas.
Back in the Dark Ages of the 1970s/early 80s, nobody had 'Christmas bedlinen'. You just had your normal winter bedlinen all through Christmas like everyone else.
Similarly, nobody had a 'Christmas Eve Hamper' with new Christmas PJs, expensive hot chocolate, a Christmas mug to have it in, a book or a magazine, tickets to something thrilling, whatever. You advent calendar had a picture, not a chocolate and definitely NOT a toy in a little drawer.
Almost nobody did outside lights (I see families who I know have fairly limited budgets do complicated lighting displays; it all costs, and if you have 4 or 5 strings of lights or light-up deer, something will need replacing every year).
If you were taken to see Father Christmas, you were very lucky, and it was probably at the local Christmas fete, and it cost a couple of quid tops, and it was someone's dad in a bad beard, and what you got was never all that thrilling - it was meant to be something fun to give you something to play with in the week or so until Christmas. There was very little pressure to shell out £25 or whatever it costs now for the whole 'experience' at a local garden centre, complete with reindeer.
Almost nobody had Christmas crockery and a Christmas tablecloth - you just got out the white linen one and the best china, and crackers were by definition cheap and tacky.
Nobody felt compelled to buy a box of chocolates for their DC's teacher and TA, because (unlike now) teachers and TA's weren't doing little Christmas goody bags for the whole class. Don't get me wrong, the Christmas goody bags are fun, and lovely for those DC who will get very little at Christmas, but they up the ante for conscientious parents.
And nobody had a Christmas jumper that was worn perhaps a dozen times this year and a dozen times next before it was outgrown.
I can see a family with two young DC very easily spending a few hundred quid on all of that (new Christmas bedding every few years, adding new bits of crockery etc, new Christmas jumpers, all part of the cost).
It's no wonder people feel their budgets are so pressured, because the pressure to spend has become massive.