Good point. But mafia is indeed involved in white collar crime, as its politicians control some contract works for building apartment blocks and major infrastructures. I would not classify that as corruption/concussion, which is a "softer" illegal way to favor an individual.
The sat-TV VAT being increased to 20% is only the latest trick played by the people around Berlusconi. He succeeded in creating a consensus machine that turns voters away from his legal problems and hides the appalling lack of competition in most of the Italian industry.
His methods are very much from the corruption/concussion "soft" illegal tool box, with one of its closest collaborators, Cesare Previti, being found guilty for corrupting two justices, however another of his closest allies, Marcello Dell'Utri, co-founder of B.'s party, was found guilty of collaborating with the Sicilian mafia.
One of the reasons why he is still in power (making the Italians the laughing stock of Europe) is that his consensus machine convinced a lot of people that the Italian justice and media are biased against him, and while distracting people with Fox-like journalism he undermined the judicial system, making legality an option for Italians. This, in turn, spurred the ease of having things done the illegal way and suggested that that is not only not too bad, but also cool.
Another reason is the lack of a strong opposition, or even worse, the opposition caring for the interests of the companies lobbying them. Let me not mention the Vatican.