Every other junior doctor earns ~£22,000 in their first job straight out of medical school, but your sister earned £33,000.
One of you is lying - I'd be more inclined to believe all the other junior doctors as I've actually seen some of their payslips for a typical month on the job as an FY1. £33,000 is a salary I would expect a doctor to earn once they've been working for 5 years or more in the NHS, not straight out of medical school. I've given you official evidence on the NHS website for the pay at every level of training and I'm not just getting this from hearsay or from the newspapers which are very poorly informed.
If it's true that the average wage is £20,000 then yes a doctor may be slightly better paid than that in their first job out of medical school. But to me, putting in 6 years of hard work doesn't justify being paid only £636 more than that when I could have earned a higher salary if I'd left school at 16 and worked in a supermarket (it's been proven that retail workers with no qualifications now earn more than junior doctors in the NHS). That £636 extra is negligible when the cost of medical licensing exams goes into the thousands - and every doctor has to pay for that in order to progress to consultant level. I might not understand what the rest of the country earn, but I don't think you understand just how much additional expense goes into medical training, all of which doctors have to pay for themselves. Without it they are not allowed to practice, and after taxes many of them are living off minimum wage. Read that article from The Guardian I showed you in my last post, the evidence is there.
It might be well-paid at face value and compared to some other jobs (not all of them) but IMHO it's not worth 5 years of study to be paid less than I would if I had worked in a shop. It's got nothing to do with perseverance, there are several doctors leaving Medicine nowadays after working in the NHS for years because the pay is just too little to live on. I'm sorry but, like many other medical students, I'm not happy about graduating so that I can be poor, unable to save any money and unable to support myself, let alone a family.