Add to that the high Italian savings ratio and you have the biggest deposits of private cash in Europe, all denomitaed in euros so it keeps its value. The Italian govt on the other, hand, takes all the nation's debt upon itself. Bereft of potential tax receipts, it issues more and more bonds to fund its activities. Now these bonds are being supported by Italy's eurozone partners in order to protect the euro.
Effectively Italy's public debt is being paid off by foreigners, while the Italians get to keep their mountains of private money.