…n is unsustainable. It could never last for the long run. There are only two sustainable solutions. Either unify all EU countries to one country with one humanitarian economic system, the ‘United States of Europe’. Or, to be divided again into the original EU countries, with different currencies and financial independence.
…well-known fact that in each country, the rich areas sponsor the poor. At the US for example, New York sponsors Ohio. California sponsors New Mexico. And Texas sponsors Mississippi. They can do that because they have only one humanitarian economic system, and the government can divide the resources between the strong and the weak. They can take taxes from the rich and give them to the poor.