Rich:
Law (Hard to get into, You either love it or loathe it)
Medicine (Hard to get into, lots of work)
Actuarial Studies (Hard to get into, I hope you like maths)
Finance (Medium to get into, I hope you like maths)
Mining Engineering (Medium to get into, I hope you maths)
Quiet Job:
Economics (Medium to get into, maths and content based)
Education (Medium to get into, content based)
Accounting (Medium to get into, not the most exciting course)
Exciting:
Tourism (Easier to get into, skills orientated, people focused)
Hospitality (Easier to get into, skills orientated, people focused)
Management (Easy-Medium to get into, content and skills)
You'll get a lot of debate about that list because everyone sees it different, and people are interested in different things.... you'll find that a lot of jobs requiring high enterence marks usually have high salaries as jobs... but tourism, hospitality and management can also pay well, although with nearly all jobs, you need to work your way up the job ladder.
The quieter courses tend not to have much job progression, such as economics, you start off as a research assistant on 40k a year and end up as a senior economist on 100k a year but there's not much after that... same with accounting.