[BY DESIGN] Level 1 Scientist only paid $33/day
My sim started the scientist career at level 1, which is supposed to pay $24/hr. Granted, she's not great at her job (I'm more there to collect crystals/metals/etc. than to fulfill the goals), but she only gets paid $33/day for an 9 hour work day (sometimes 11 hours if I let her stay late). I started another new game with a different sim and was able to duplicate the issue. My original sim has not been promoted yet (as I said, she's not exactly trying), so I'm not sure if the issue continues beyond level 1.
No mods or CC.
I believe that the hourly wage that's listed for active careers is how much you'll earn if you do not join them at work, and send them off alone. When you're actively doing the career, it's definitely by design that it depends on how many of the goals you complete.