This thread could be likened to sharks in the middle of a frenzied feeding session. However I believe the sharks have actually dreamed up the shoal of food. There is in reality only a tiny number of fish in the shoal!
The thread so far has not managed to put forward any REAL evidence of a major (or even minor) drain on the work for CPLs.
There are clearly areas of grey within the law, but I have not seen anything that would point to PPLs 'stealing' work on rig flights, HEMS, Pipelines, survey,etc etc. So lets face it, we are now talking about a much much smaller portion of the heli industry in which there may be a problem, yet some of the contributors to the thread would have us believe that the theft of their work is prevalant.
In any group there will be the odd rogue and aviation is no exception, but this supposed problem has been posted up way beyond reallity.
However if you know of any grade of pilot (not just PPL) taking on work beyond their qualifications, then surely the remedy is is your hands.