tbh though, I'd argue that there are similar, if not more, number of possible career options. It'd be just as hard for a physics grad to get into the biomedical field or medicine related businesses imo. Do agree on the possible academic postgrad paths though. Medicine does restrict you a bit more than general natural sciences, but that's more or less applicable to biomedical fields. But as said, don't think it'd make that much of a career difference in terms of opportunities outside of academic fields.
In regards to OP, pay isn't that good for most medics considering the effort. You get roughly 60k a year for 8 years after graduation (if you do become a surgeon/consultant, but GPs are roughly the same so meh.), which adding 5/6 years of uni means 13 years spent. In that time, you'd have gotten a PhD if in academia, or roughly the same amount of money. Add to that your specialty will more or less determine whether you'd get any additional income from private practice/shortage-so-expensive-overtime/awards, it isn't that safe a path for financial success. On the other hand, no matter the pay, it still boasts one of the highest, if not the highest, employment rates of any field. As everyone says, IB pays more than what a junior doc would make, and a consultant would with the same number of experience/years.
It also really annoys you when you're still in uni and your Econs buddy starts a job in the City for 50k pa Can't beat the job security though. Unless you get struck off the register. Then you're more or less screwed.