In truth a clear-headed physicalist shouldn't be thinking any of these dualist thoughts. If pains are one and the same as C-fibres firing, then there really isn't any possibility of having 'one' without the 'other'. Once you properly appreciates physicalism, this dissociation should cease to appear possible - C-fibres with pains should strike you as no more possible than squares without rectangles.
Whenever I tour my district and I ask small businesspeople 'what can I do to help?,' they tell me to just get government out of the way and they'll create the jobs and grow on their own.