I think if you're motivated and keep your eye on money, career options as you go along WHATEVER you study or do will (probably) pay off.
Affluent people don't necessarily take any advice on trust, but tend to make good decisions based on some research and long term planning.. whether it's property investment (not even with squillions, getting a two bedroom flat with lodger) , or being frugal on some things and having some tough years but riding it out.
If you're a bit more alternative go alternative (learn about investment or something) if you're quite a team player likeable face fits type of person, go mainstream grad job.
There isn't any direct, simple route, just critical thinking and application.
Don't take what newspapers or university marketing departments say on trust, they have agendas.
Find people who are doing well financially and see what they do, and how they've got there.
A Law or STEM or engineering degree doesn't necessarily pay off, unless you know how to leverage it.
An affable English lit or Arts graduate who gets onto a big scheme will do much better than a super specialised scientist.
I think some people (possibly elements ND?) do tend to not read the room.
I'd say a lot of PhDs may be of this category.
It's not the qualification itself, it's that it tends to be a magnet for people who can be a little bit unworldly/pernickety/gullible.
Unfortunately things like Masters degrees have been cash cows/vanity qualifications for universities for a while, and although you respect the work, looking up if things are actually worth it (Reddit or search for online info) is always helpful.