a2) Continue working the job for now, donate a substantial fraction of your income to charity, climb the ladder as rapidly as possible, and work to change the company in a direction you consider preferable if you think it's salvageable. (While there's a small set of jobs that are nearly irredeemable, such as the folks in a tobacco company or free-to-play gaming company researching how to make their product more addictive, there's a much larger set of jobs with a balance of questionable activities, with potentially some amount of influence over those activities.)

Interesting thought exercise: suppose you woke up tomorrow with the position (and requisite skills and connections) of running a company most people would consider irredeemable, such as a tobacco company. Could you, within a reasonable number of years, turn them into a well-respected company that's a net positive influence on society (and not just by dismantling them and donating the results)? I'd bet I could, within 8-10 years. (A bit less for a company for which the plan doesn't involve a few components of scientific research and advancement.)