I was in a politics tutorial today, and we were discussing the economists who involve themselves in political thought in some way or another, such as Hayek and Nozick. I realised how perfectly the pursuit of the economist characterises Te. There's a complete disregard for anything that is ineffective or inefficient, and the whole concept of economics is completely action-orientated. And this is just why it needs Fi. Fi is the opposite of economics, effectiveness regardless of morality and the like. It introduces the notion of morality, forcing the Te to consider such phenomena as the environment and other human beings. Political philosophy is about creating an ideal system by which to live from a moral standpoint, and effective action gives little concern to this. And this is precisely why Te and Fi work so well with one another.