Karl Otto Pohl, who quit as Bundesbank president this summer, is picking up plum after plum. In the first week of October alone, he was named a partner in the classy Cologne private bank Sal Oppenheim Jr., a director of Dutch mutual fund group Robeco, and a trustee of the Krupp Foundation, 75% owner of Fried. Krupp steel. Earlier, he notched up a directorship of Bertelsmann, Europe's biggest media group. Pohl clearly stands to rake in more than his $210,000 Bundesbank paycheck. But he's keeping a central-bankerly silence about how much more.