The European Union should ease its demand for the U.K. to allow the free movement of workers in return for post-Brexit market access because that would help keep Britain tied to Europe, a senior member of Chancellor Angela Merkel’s party said.Norbert Roettgen, head of the German parliament’s foreign affairs committee, took a more accommodating stance than Merkel, who signed up to the decision of EU governments that the so-called four freedoms -- capital, goods, services and labor -- aren’t negotiable. Roettgen speaks to Bloomberg's Caroline Hyde in Berlin.