Medicine does have an employability level that is hard to beat, but it's far from the best degree in terms of post-grad earnings, and there are lots of degrees that make you very very employable.
Have you looked into any engineering degrees? The employability varies depending on the subspecialty, but some you can do really well out of. My friend doing Chemical Engineering is going straight into a 32k/yr starting salary even if she gets a 2:2