He may not be very effective (he is a lame duck PM) but for heaven's sake do not suspect his integrity. Kindly study his background and his upbringing. He is the most qualified (in terms of academic qualifications) executive of any country in the world currently and we are proud of him. He has no need for money & hence forget Swiss accounts.
However, I will support you that he should quit in order to salvage some self pride, dignity & honor, instead of running behind the backseat driver from Italy.