I'd be wary that anyone is going to pay it off tbh. You'd have to start out earning high
I did dentistry and by the time I'd qualified, and done my foundation year plus a couple of other training years my loan had increased quite dramatically. I now pay about the interest off each year. I won't ever pay my loan off but will pay quite a significant amount. By the time it's wiped.
I also have friends who's parents paid their fees and therefore will never have a loan and will be a good £300+ better off each month.
This is the thing with any well paid career, there's usually a few years at the start that aren't that well paid, with the interest what it is the loan value will sky rocket, meaning that you will never pay it off, basically the government maximises the amount you pay.
Particularly with careers such as medicine where the government controls your salary. For the first few years, this is low so you pay less than interest and the loan value increases. Even though you may pay off the value the starting salary ensures you pay your loan until its wiped.
It does make me angry, people just 2 yrs older than me essentially earn an extra £300+ more than me a month doing the same job, people born to richer families earn £300+ a month more. It is not a graduate tax