One country's decline is a benefit to another one. It might sound cold and selfish but the truth is that if one economy is declining, you can use this to your advantage. If one country has a failing economy and they can no longer produce high quality products and their trade is losing significance then another country can sweep in and give better offers. This is simply the reality and so economy should not have emotions in because it will not do you good. If you want to improve your financial state, you have to compete. This is true even with smaller scale marketplace. Not a country's but let's say in one city. If one seller fails to deliver good products, you can sell better ones and take their customers.
If a country economy is having challenges it shouldn't have to affect there quality manufacturing because there should be sufficient resources for it, unless they intentionally decided to do it on the excuse of bad economy, at that time if there is something they should be more focus on is the quality because that is were some revenue will be originated from so actually if they cannot do that the people they usually supply to will find another country who could do better than them. Improvement is the new state we are because as a country who knows what bad economy could cause they wouldn't want to have it because it will cause a poor internal improvement on them.