European leaders have already set aside a bailout package for their banks in case any pigs-nation defaults.
It's hard to imagine the defaulting nation to remain in the Eurozone though.
The penalties of defaulting are probably already negotiated to far outweigh the penalty of stark austerity measures.
but there is no way of getting out of the eurozone, both in the "no actual procedure" and in the "no actual chance". If greece got out of the euro, it would get instant weimar-like inflation.
Moreover, the SPV and the bailout plans in the eu seem to be more like smoke and mirrors than concrete stuff (e.g. bailing out greece with money coming from portugal which is in the same position)
The penalties of defaulting are probably already negotiated to far outweigh the penalty of stark austerity measures.