The Economist writing about "The German Problem"

Sub title: "Why Germany's current account surplus is bad for the world economy".   The Economist goes on to write "At bottom, a trade surplus is an excess of national saving over domestic investment".   That's a crock.  Trade surpluses happen when you manage to sell abroad more stuff than you buy from abroad.  Having an array of good products at the right prices, helps with the sales end.  Having a good domestic supply of quality product helps keep imports down.  Germany has a lot of world class products, look at Mercedes, Porsche, VW, Lowenbrau, Airbus, and many others.  Who wants to buy an import when the domestic product is as good as you can get any where? 
   If the world wants to cut down on Germany's trade surplus, the world will have to offer products as good as or better than German products, at a competitive price. 
   Writing like this makes me wonder where the Economist's writers went to school.  If their economic writers are so deluded (in a magazine named the Economist!)  do their other writers know anything at all?