If you are lucky enough to be a Portuguese citizen you surely have experienced shortage of something, if only the country’s extension. We may say that Portuguese are, therefore, potential borrowers. A Portuguese average vine grower does his shopping at supermarkets and buys cheap products, mostly Buyer’s Own Brands. Let’s say he buys a 1,5 litres square pack of orange juice at PINGO DOCE. The Portuguese vine grower’s family will then drink the whole lot and throw the empty pack away (luckily the family adheres to a recycling waste disposal system and this empty carton will have a SECOND application). 
Now, if if you are a proud German citizen you surely have witnessed other countries shortage of something. We may say that Germans are, therefore, potential lenders. A German average vine grower does his shopping at supermarkets and buys cheap products, mostly Buyer’s Own Brands. Let’s say he buys a 1,5 litres square pack of orange juice at PINGO DOCE. The German vine grower’s family will then drink the whole lot and … now comes the cultural and money making difference… the wine grower takes the empty carton to his vineyard and re-uses it as a new vine protection or a grow tube. After the protective service is well performed he will throw the carton away (surely the family adheres to a separative waste recycling system and this empty package will have a THIRD application).
The money saved the German vine grower with the application #2 (out of 3) of PINGO DOCE empty juice square pack represents the surplus that German bankers have to act as lenders to 2 out of 2 application (therefore borrowing) countries such as Portugal…
This Q.E.D. is supported by a picture taken at Deidesheim, Pfalz, during MUNDUS VINI #13, where you may see the PINGO DOCE carton vine protections used by a German vine grower.
