I believe somewhere earlier in the thread it`s been mentioned that the pilot had 25 years flying experience under his belt. So it is not as if the lack of another could imply Scrooge or dare devil qualities for the owners.
For those who lived and can remember the tragic death of Onassis` son in his Piaggio out of Athens. He too had a highly experienced professional pilot. Unfortunately it was not sufficient protection to avoid his death. For those who may not be familiar with the event I would suggest a book titled "The deadly sins of Aristotle Onasis", written by Stuart M. Spencer. It is much more than just another crash.
In this instance it does bring into question as to who was in control at the time of the accident. In good time the AAIB will shed sufficient light on the subject.