Fair Discipline????

I think the correct technical term for people like that is 'brown nose'. And really, the fact is that most managers can't stand a 'brown-nose' (slang= 'suck-up', BTW), but they let they play their games so they stay away from them. And 'brown-nose' nurses (who are usually spnd more time stirring up muck than doing their jobs), eventually always get their just desserts.

This phenomenon was identified a looonnnngggg time ago by Social & IO Psychologists (halo effect & horn effect) - it is certainly not limited to nursing or even to work situations. Basically, if you have a 'high opinion' of someone, they have to really mess up bad before it affects your opinion of them. Conversely, if you have a low opinion of someone.... they can do remarkable, wonderful, extraordinarily fantastic things -- and you will generally attribute it to sheer luck or accident rather than change your existing (bad) opinion of them.

Basic management training courses include this information as part of the content on eliminating bias & performance management Performance Appraisal Biases . Sounds like you may be dealing with a supervisor who has not had very much (if any) formal management training. There's not much you can do other than careful documentation & following your employer's grievance process if you feel that you are being treated unfairly.