because the boss is the same type of person and likes to always hear how great he is constantly and how above everyone too. So as you said some people will pretend and say to him/her what he/she wanna hear in order to gain benefits while others that don't flatter won't say a thing and you know what they gonna get :P

in my universe :P i would use those people you are wondering why they exist for scientific experiments :P that way we gonna at least have progress somewhere and may save lives or at least make a better world :P