I don’t recognise the anecdote about the re-mark as that just wouldn’t happen in most universities that I’m familiar with, all of which state very firmly that students can’t appeal academic judgment.
But I do agree about grade inflation, absolutely. No one seems to get a 2:2 degree anymore, in my experience. And, no, it’s not because students are getting better and working harder. Quite the opposite. My university deliberately manipulated the mark scale a few years ago to ensure grade inflation. But when you’ve got league tables and metrics focused on “value-added”, it encourages this sort of thing. Take weak students and inflate their marks and you’re sailing up the league tables.