Hi again Creampuff. Firstly, this is starting to get way off the original topic so I'll be brief and try not to comment further on this thread.
As you may be aware there is probably a million definitions for a "professional pilot". In any case, I would suggest in broad terms that a professional pilot is one whose livelihood is dependent to some degree on flying aeroplanes for a living (and maintaining the required licenses and qualifications relevant to that employment).
While you might believe that CASA "flying" staff don't fit the above definition, at this point in time, they are required to maintain certain minimum qualifications and are required to fly aeroplanes in commercial activities, albeit on an ever decreasing basis.
Regards.
Henry