CEOs of public companies? Depends on the strategy of the board and the CEO and what the shareholders want to gripe about.
They will always come out ahead, any token "Salary reduction" would primarily be for show anyway, it would do *nothing* to address all this wrongfully perceived injustice.
I can assure you that if you spent more time and energy on your own career and financial situation, it would yield far greater, and longer lasting returns on your investment, rather than on CEO bashing or CEO salary reduction gimicks. It may even be more fun.