GPs in the UK earn an average of £103k if they're a partner in a practice or £54k to £81k if they work for a primary care trust - that is if they work directly for the NHS unlike many GPs who are self employed but contract their services to the NHS but who don't work for the NHS. [1]

They also have to go through a five or six year medical school and five years of post-graduate training along with profesional exams (MRCGP exams). They're also bit of an anomaly compared to other doctors in the UK - consultant salaries are between 75k and 100k according to the official pay bands [2]. The only way that most doctors can make serious money is by having a private practice along with the risks and costs that come with it (for point of reference, my other half is an obs and gynae surgeon and in that field the private insurance is £150k a year).

[1] http://www.telegraph.co.uk/health/9300823/Most-doctors-are-n... [2] http://www.nhscareers.nhs.uk/explore-by-career/doctors/pay-f...