No, when a company hires you, the company becomes part you. And you have every right to do whatever you want that you think is best for the company's future, ev

No, when a company hires you, the company becomes part you. And you have every right to do whatever you want that you think is best for the company's future, even if it undermines what managers says -- be that whistleblowing, refusing to stack rank, refusing to hide the fact that a stack-rank policy exists. If the company cannot convince you that its policies are efficient and moral, then that is their mistake for hiring somebody who sees the world fundamentally differently. If they don't want people to do that, they should tell every new manager in the hiring interview "Part of working here as a manager involves stack ranking people as low, even if they are doing great work, and not telling them they are under stack ranking, and if you cannot do that you won't want to work here"