Iceland also apparently knew that so-called investor confidence is a joke as far as countries are concerned. A few years on, who is even going to remember this? Of those who remember, who is going to think this might happen again - particularly since iron clad policy was put in place to prevent it from happening again.
Maybe Irish and Greek politicians are just too chicken to do the right thing. Or, and I think thats unfortunately more likely, they are fighting for vested interests of a few that pay them money rather than their country or their people. Iceland stands out in that the politicians acted in the interest of the people.