When sovereign states have their own currencies, citizens are willing to see their tax money go to the weakest regions. That is an expression of national solidarity, a sense that a country’s citizens belong together and are prepared, in a crisis, to sacrifice their own interests for the collective good.
但是，从根本上来说，这是一场政治危机。当主权国家拥有自己的货币时，公民愿意看到其上交的税收用到一些最弱的地区，这是国家团结的表现，国家的团结感能够使国民团结起来，在危机期间，为了集体利益，他们会做好牺牲自己个人利益的准备。