You don't solve persistent corruption by ethics courses you do it by removing conflicts of interests, changing incentives, and enforcement. They may not be easy to do, free of costs or even within capability to change.
Ethics could still be useful of course but the institutions need to care about it and the incentives need to be changeable accordingly for it to be more than just a figleaf.
Today, I'm not so sure. People do tend to completely ignore ethics when there's social pressure to do so, but maybe the author of this essay could have benefited from it.
Requiring CS, CoE, and EE majors to take courses on the humanities - without making any statement about the merits of those courses - the sort of thing that the university decides based on its political and financial goals, not based on its desire to create stronger CS professionals. A course with a title like "CS Ethics" sounds much more relevant and beneficial than "African American Womyn's Studies", which is the sort of thing I would have to take to satisfy my university's ethics requirement if I hadn't satisfied it with AP testing.
http://www.faculty.ucr.edu/~eschwitz/SchwitzPapers/BehEth-14...
Personally - I haven't taken any classes. I once wrote a template mailer that financial institutions used to mass mail customers, which I felt icky about, but I still did it to the best of my ability.
1/2 way through my career, I took a pay cut to leave finance and work in cancer research, mostly for the interesting work, but I do feel better about it as it's more positive sum for the world.
I would not begrudge someone doing something dodgy but legal to feed their families. Maybe they should feel a bit bad and look for other jobs, but I can understand.