Ireland has about €226bn of
debt. This includes €19bn of state savings held personally by Irish people in Ireland, and €142bn of government bonds held by institutional investors all over the world.
State savings are de facto senior to government bonds. I am pretty knowledgeable on this topic, and you would need a sovereign default on a spectacular scale (as in wiping out a large majority of the €142bn held by institutional investors) before a government would touch state savings.
Remember that there are hundreds of thousands of state savings holders, all of whom can vote. Confiscating even 10% of their €19bn would cause orders of magnitude more difficulty than just squeezing €2bn more out of a default on institutional investors.
It's not zero risk (nothing is) but it's as close as you can get.