Media for development: does good journalism promote transparency?

One of the most famous answers to such questions comes from former World Bank president, James Wolfensohn, who said: «A free press is not a luxury. A free press is at the absolute core of equitable development, because if you cannot enfranchise poor people, if they do not have a right to expression, if there is no searchlight on corruption and inequitable practices, you cannot build the public consensus needed to bring about change.»
These are fine words. But what do they actually mean? It’s not clear to me how a «searchlight on corruption» leads to the building of consensus, for example, or whether consensus is always the result of «enfranchising poor people»…