You can't fire someone for griping as long as the gripes are objective? That seems kind of ridiculous. It's clear that companies should prefer employees who cri

You can't fire someone for griping as long as the gripes are objective? That seems kind of ridiculous. It's clear that companies should prefer employees who criticize constructively (i.e. emailing the boss to say that people would get more done if they made more money but didn't have to work such long hours). What purpose would it serve to make it harder to select such people?