Everyone's a liberal when they're young. When you're a student, its all about being free and letting others be free and saving the world and DOING something with your life, to aid others.
A bit like all the hippies in the 60s really. Until they settle down, they hate everything right wing and they want peace and love and all that stuff. Then when they become solicitors and start living the middle-class high life, they realise that they want to keep hold of their hard-earned cash, as opposed to seeing it go to the filthy working class.
DiS' liberal army is the same. You're all the leftiest people in the world right now, but when you're all earning big bucks and you're big boys and girls, you'll realise what the world's actually all about, and start voting Tory.
The sooner you start accepting your fate, the better, really.