It's part of a writer's profession, as it's part of a spy's profession, to prey on the community to which he's attached, to take away information - often in secret - and to translate that into intelligence for his masters, whether it's his readership or his spy masters. And I think that both professions are perhaps rather lonely.
The creation of George Smiley, the retired spy recalled to hunt for just such a high-ranking mole in 'Tinker, Tailor,' was extremely personal. I borrowed elements of people I admired and invested them in this mythical character. I'm such a fluent, specious person now, but I was an extremely awkward fellow in those days.