...Many university maths courses now spend much of the first year teaching stuff that used to be in A-levels.
But in GCSE's and A-levels they learn some topics which only ever used to be taught once you got to University.
There is
some evidence of some dumbing down in GCSE's and A-levels but I don't think it's particularly about what gets taught, and how much of it gets taught.
The problem more seems to be with the testing side of it. Like getting rid of the Oral exam in a languages GCSE - it doesn't mean that less gets taught but it does mean that it gets easier to pass.
Similarly revision time has been greatly increased. This wouldn't be bad if they were reinforcing what had already been learned to enable a deeper understanding of the subject, but they're not, the extra time is taken on exam technique. i.e. how to pass the exam rather than understand the subject.
The education system just gets worse and worse, and now it seems we're caught in a bit of vicious circle. It's got so bad because it's been meddled with so much over the decades, but without further meddling it won't get any better. It's a shame that politics has such a bad habit of getting in the way of good education.