Standard Bank Staff Member

I would just like to ask if we as customers are not allowed to use our phones while in the bank why is the staff allowed. While I was in the queue at the tellers the receptionist (Bothlale Nghakane) was texting and voice noting the whole time. And I was thinking to myself what if he is talking to someone outside telling them who is with drawing money maybe or something. And I think it is very unprofessional for a staff member to be on his phone while there is customers in the bank.