At present the Eurozone is being turned into a fiscal union which means each state within it has to follow stricter guidleines on how they tax and spend. This is a good idea from purely economics but Politically? So to build on stronger forundations I think that there should be a managed global economic default, with infrastructure and assets being retained by each nation state and shareholders according to company law. That way there is less of a depression and sel;fish and destructive economic activity (ie over production of food rsiking dust bowl crops in the succeeding years).