Heading isolated and paranoid into the night, these are the voters our politicians created | Aditya Chakrabortty

So many citizens are angry and cynical, like Taxi Driver's Travis Bickle. I wish our leaders would ask themselves why

You talkin' to me?" One of the most famous speeches of the past half-century is delivered with only a mirror for an audience. Alone in his cramped bedsit, clothes drying on a line in the corner, Travis Bickle dons a green army jacket and practises pulling out a pistol. And so unravels Taxi Driver, the classic film study of isolation and lethal madness. Well, I'm the only one here. Who the fuck do you think you're talkin' to?"

Where does it come from, the paranoia that shrouds Bickle? From steering a yellow cab around and around New York's concrete claustrophobia. There is this kind of myth that the taxi driver was this friendly, joking kind of guy who was a character actor in movies," said the film's writer, Paul Schrader. But the reality is that it's a very lonely job, and you're trapped in a box for 60 hours a week."