I suspect the effects they're seeing are caused by:
- dramatic increase in cost of living in the UK (low salaries really burn)
- UK university degrees becoming easier. (you won't believe what passes for a 2.2 these days)
- The game industry isn't quite as cool as it once was. Chances are you'll work on a crappy game that sells badly, or if it actually sells well you won't see any of the profits. Teams are so big that when friends ask you what bits you made you sound pathetic.
Now if the game companies truly want to get developers with the high skills and advanced education needed to work on cutting edge games, they need to pony up the money. The field is notorious for insane schedules, low pay, crappy benefits, and poor management. Get your own house in order before pointing blame at others.
I wonder if this skills shortage isn't partly because the students of these game development programs don't get an education in things like computer science, software design, fine arts, literature, and history?