Allegory for the 60s?
Towards the end when the stoner guy went on a rant about the end of the decade wasn't too far away and how there would be a lot of refugees it rather heavy-handedly made me think this movie is intended to be an allegory for the end of the 60s and the baby-boomers "growing up." Especially with the way I gets a haircut and basically dumps Withnail with no plans to ever look back again.
I'm not sure what to make about the movie's POV about the 60s - seems like it's saying they were a mess of squalor because that's the way Withnail and I lived, kinda mooching off the wealth of the previous generation (monty) and wasting their potential (Withnail's education).
But the abandonment of Withnail seems like it was meant to be extremely tragic, not something he fully deserved either. So, is it that both the 60s and 70s-80s suck, just in different ways?