That's why he says he has given his life to working in pharmaceuticals because, as he puts it, it has an end point beyond 'Let's sell a few more cases of Coca Cola'. 'I don't need to work. Financially, I am OK. I work for the ends I want to achieve ... And if I believed I couldn't affect things, then I would retire. The irony is that, actually, I don't enjoy the day-to-day, it's a very tough life. But there is enormous satisfaction in the fact that I can make a difference.'