The question to ask u is why can't they get paid the same? There is this misconception that gp and FM is the same. Fact is they are not. Layperson dunno ok, u medical student or doctor dunno is really bizzare. If u are local medical student, pls go slap Ur m3 preceptor at the polyclinic.

FM is a proper speciality in many countries. Hopefully sg recognise it soon.

What is complexity ? What is tough? End of the day a fully trained guy should be able to do this job well.
You ask the im consultant to see a depressed patient with diabetes not taking his med and having piles and griefting away from a dead wife, he will sweat. For the FM consultant, it's part of the job. You ask the FM consultant to investigate fever of uknow origin with deranged electrolytes, he will sweat.u bring a schizo patient to both the Im and FM consultant, both will sweat while the psy guy will be chilled about it.

So , what is the point behind your question?