A special report in The Economist says just that:
Germany does have some important lessons to teach the world, as this special report will explain. But the idea that Germany has got everything worked out requires some big qualifications. It has an ageing population, a growing share of which is either of non-German origin or poorly educated, or both. And Germany’s towering export surpluses are at risk because its trading partners cannot sustain deficits for ever. Strikingly, too, the German model is no longer all that German. Over the past decade the country has rewritten its recipe for success, incorporating many foreign ingredients, including some from the much-maligned Anglo-Saxons.