Highest paying career
Solution 1:
Criminal: Master Thief making $565 per hour, 16 hours a week ($9040)
The next highest hourly rate I spotted was Science: Mad Scientist making $481 per hour, 13.5 hours a week ($6493.5)
There are more comparisons at Career Paths List A-L and Career Paths List M-Z
Note that the Rock Star track makes cash based on performances ("varies in thousands")