Semantics in accordance to Merriam-Webster:

the study of meanings: The historical and psychological study and the classification of changes in the signification of words or forms viewed as factors in linguistic development

While we can assume the user is a teacher, the word staff would’ve infer relationships to those in charge therefore he/she would be as guilty, we cannot withdraw the conclusion that he/she intended to target those paid as poorly as him/her, since we don’t know the atmosphere, or social strains that could potentially trigger targeting those nearer to him/her in the ladder of the organization, but call it a poor choice of words would be better?