[riffraff]

do you have numbers showing that peripheral countries borrowed more after they entered the euro?

AFAIK Italy's deficit has been more or less stable for the last twenty years while debt has gone down for the first few years of the euro presence and has only risen again after 2008.

As far as i can tell italy's problem has been and continue to be a de facto stagnation with growth rate around 1%, which surely is not the case for others e.g. spain.