Economic downturn in one nation, could drag the global economy down into recession. As occurred during the 2008 economic crisis. When economic slowdown associated with US banking issues toppled the world economy. Nations are networks of trading partners. When one goes down. It can have a chain reaction, where others are taken down with it. If sacrifice is the smart call to make. I think people might question why the EU hasn't already sacrificed greece. To encourage them to resolve their debt crisis.
That could happen eventually if deficits rise to a point where they become unsustainable. Nations with high deficits and debt could be cut (sacrificed?) to maintain overall liquidity. That could be an interesting discussion/debate topic. If only on the more awareness and information people have, they better they're usually able to prepare and support the right stance on things.
Most of the times the reason why if one goes down and the others also suffer is because they are too much interrelated. The import/export is something which is very essential for all of them. I do believe that the Nations which are able to meet their requirements themselves, without the help of any other external force will be the one's to survive.
We saw the same thing happening in pandemic. This was the time that I saw the real benefit regarding living in a country like Ukraine which is also known as the bread basket of Europe. When the pandemic hit and the import and export was banned. Things did not change at all! We had access to everything since it was being produced here . For the local farmers it was a boon. I do believe that countries need to be *self sustainable* that would be the only way to go. Plus they have to stop printing money for once and for all and start giving jobs to people. We need a new era of sustainability, much like industrialization but this time more environment friendly.