Salary for level 9 and 10 job titles are too low in my opinion. For example CEOs and Business Tycoons are upper middle class at best in the sims 2. These people in real life are swimming in cash. Is there a mod that increases salaries of high level jobs?

You can do this via SimPE and Bidou's Career Editor. You will, though, want the "modifiable" career packages from this thread: https://modthesims.info/showthread....ighlight=career

Once you have the file(s) you want, extract them to somewhere other than your game folder (I keep a Work folder for this sort of thing), open with SimPE, select "Bidou's Career Editor", make the changes you want, and then save the changed file to somewhere in your Downloads folder (recommended: a subfolder called "Default Replacements" or "Careers" so you can find them easily if you need to).

The replacement file will override the original with the salary amounts you prefer.

Note: The same procedure can be used to change job titles and, to a limited extent, career outfits (it's possible to do a more thorough job but it's a great deal more complicated).