Ten Point Minimum Penalty - Is it necessary?

Looking at the start lists, results and race penalty from a number of Club Nationals it is apparent that many races attract several sub ten point racers and have a very low or negative calculated penalty.

Is there a case to ignore the calculated penalty for all racers with a race penalty in excess of 10 and apply the minimum 10 points to all racers with a race penalty less than 10. This would ensure that all sub 10 point racers could not make points in a Club National while ensuring that those with higher points are not loaded by 10 points. It would also ensure that no one could earn less than 10 points in a CN. This would only apply in races where there were a pre-determined number of sub ten point racers included amongst the finishers.

What are the flaws, advantages or disadvantages in changing the current system? Let's have your views.