Man...
Permies really hate being permanent workers don't they?
If contracting is all about piles of cash, living the high life and paying less tax, why aren't you doing it?
Is it fear? Is it that nagging doubt you have about your level of skill or ability? Do you not have the social skills to promote and sell yourself? Can't be bothered to keep up with the industry?
Or perhaps its because you enjoy your Wednesday night pint with the other permies ranting about how shit your boss is / company is / department is?
Jeez.