Not everybody gets to post an open letter about the job they just resigned from in the New York Times. But then, not everybody works at Goldman Sachs:

I knew it was time to leave when I realized I could no longer look students in the eye and tell them what a great place this was to work.

When the history books are written about Goldman Sachs, they may reflect that the current chief executive officer, Lloyd C. Blankfein, and the president, Gary D. Cohn, lost hold of the firm’s culture on their watch. I truly believe that this decline in the firm’s moral fiber represents the single most serious threat to its long-run survival.

Over the course of my career I have had the privilege of advising two of the largest hedge funds on the planet, five of the largest asset managers in the United States, and three of the most prominent sovereign wealth funds in the Middle East and Asia. My clients have a total asset base of more than a trillion dollars. I have always taken a lot of pride in advising my clients to do what I believe is right for them, even if it means less money for the firm. This view is becoming increasingly unpopular at Goldman Sachs. Another sign that it was time to leave.

It sounds like a standard resignation letter from someone who's been at a job for way too long—"Taco Time Totally Sucks Since They Made the Break Room Into Storage Space," by Benji McElroy—but because that job is one of the largest financial engines in the world, it's maybe worth a little more of your time and attention.