I don't know enough about the situation to guess at how close to the edge the EU is, but I have to believe member states will begin to break away, depending on whether they're giving or taking more. Germany calls the shots, but there will come a time when leaving is the only move.
This guy posts good analysis tweets of Germany's situation, complete with charts: https://twitter.com/MichaelAArouet
He rightly points out that Germany's growth has relied on cheap energy from Russia, imports from China and cheap labour from Eastern Europe, all of which have now crumbled.
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