I read (I think it was in the FT - the other one) that only one in five people in Berlin actually work for a living (including those working for the federal government), that all the rest are either depedants (children, stay-at-home spouses etc), pensioners and/or on benefits, and that in the ex-GDR "greater Berlin", the situation is even worse.
If that were true, Berlin would not quite be the right place for an airline hub...