They're the troika of mandarins who have shepherded Australia into unchartered economic territory: imposing a price on a common pollutant. Their fingers are all over climate policy, from the carbon price to mass rural tree-planting. They are Martin Parkinson, Blair Comley and Ross Garnaut -- and together these card-carrying economists take top spot as the most powerful driver of Australia's low-carbon economy.

The Power Index has profiled business figures, lawyers, regulators and inventors (politicians were excluded) -- why put the bureaucrats ahead of them all?