Most corrupt acts don't take the form of clearly immoral choices. People fight those. Corruption thrives where there is a tension between institutional and interpersonal ethics. There is "the right thing" in abstract, but there are also very human impulses towards empathy, kindness, and reciprocity that result from relationships with flesh and blood people.
I've been an occasional visitor to Interfluidity, but after reading these four sentences I'll never miss another post.