The benefits’ valuation of a public good is a complex procedure. Many benefits are external benefits. In other cases the perceived benefits are contingent on the individual condition or they will be perceived in a future time. A complete valuation needs a lot of information about the public good’s characteristics. We introduce a variable representing the citizens' available information in the citizens-bureaucrats relationship. In a public choice perspective with bureaucrats maximizing the budget size, the paper shows that an increase of dispersion of information among citizens can reduce the bureaucracy size.