Snowpiercer was recently released on Netflix UK and since the release I have watched it perhaps, 10 times. The first time I watched it, it hit me so profoundly that I was sitting just thinking for about 2 - 3 hours afterwards. It is a very thought provoking movie.
I've also been reading into the links between snowpiercer and Willy wonka and the chocolate factory, and I must say, if you haven't looked into it, do.