I would not bother with second incomes. Personally I couldn't stand being represented by a robotic lobby fodder merchant, who just did as told. Dr.Stoate says, "It is apparent that Labour candidates standing for Parliament at the next election will be expected to give up their outside jobs if they are elected. I respect this view but I think my own contribution to the work of Parliament would be diminished if I was to give up general practice, which is why I have decided not to stand as a candidate at the next general election." Sad reflection on the current lemming-like desire for apparatchik politicians.
Dr.Stoate will have contributed far more that someone coming out of a researcher's office at 22 and "never looking back"!