Not surprisingly, a wind farm operator is at the center of Germany’s latest major financial swindle. With 1,300 employees, Prokon is a relatively small company. Yet its advertisements were well-known to Germans. They always had three parts: pictures of a wind farm; a vague message that “something” had to be “changed”; and a request to make a loan to Prokon. In return, one was promised nothing less than “a future worth living,” and 8 percent interest per annum. One of these propositions must have been alluring to many Germans, for the company successfully gathered about 1.3 billion euros (2 billion...