parisjet, you've already said that you find the corporate aviation world to be tight and insular. I and most others would agree with that. In fact, this is true for much more outside the corporate world. It's simple really...
As most European corporate aviation firms are owned by mostly middle classed white people, it makes sense that they will naturally associate themselves with other middle class white folk in the business. As middle class white folk normally know mostly other middle class white folk, these middle class white folk would be in line for more opportunities. Now we have a fully established pilot base who is mostly middle class and white. Being a tight and insular industry (i.e. one which does not put applications out to the public), is it therefore any wonder that Joe Bloggs (who is white and middle class) gets the job through personal recommendation?