This is a series asking where we are going as a nation. Part 1 of this series looked at hopes and expectations and found them fragmented by generation. Part 2 looked at the sustainability of our economic model and found a need to generate a new one. Part 3 looked at the ruling ideas of the state, and the interaction of ideas, interests, and institutions and found our institutions were nowhere near as bad as many people believed, though they risked further calcification. Part 4 asked a more sectoral question: who earns what, and where, now and into the future?…