Political corruption has not disappeared with modernization, as some scholars believed would happen. On the contrary, corruption in Western democracies is often described as 'systemic', 'institutionalized' or 'diffuse'. At the same time, the political class is said to have undergone considerable change: catch-all parties and 'media power' have changed the structure of political careers and created new types of professional politician. Little thought, however, has been given to the specific consequences of corruption for the political class. How do the careers of corrupt politicians evolve? What are the capabilities required of a politician who participates systematically in corrupt exchange? What are the motivations which push individuals, in situations of widespread corruption, in the direction of politics? These are the questions with which the present article proposes to deal. In the first section some hypotheses will be presented on the alterations caused in representative democratic regimes by corruption. In particular, the idealtype of the 'business politician' will be defined as one possessing the abilities necessary for the functioning of the system of corruption. Thereafter, an application of these hypotheses to empirical research will be proposed. The results of an investigation of a number cases of political corruption in local government in Italy will be used to illustrate some of the attributes of the 'business politician': in particular the skills in illegality enabling the organization of corrupt exchange (part II), the networking abilities corrupt politicians utilize to create support and complicity (part III) and, lastly, the fact that politics is their only available route to upward mobility (part IV). In part V, a contribution to the theory of political corruption will be offered, starting from the concept of 'moral cost'. Proceeding deductively, we will discuss the conditions which reduce the moral cost of participation in illegal activities and therefore increase willingness to participate in corrupt dealings.
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