Not govt employees, but specifically for teachers in govt colleges. The same reasoning for why that is unethical can be applied for those in private colleges as well, can they not?
Precisely what I meant. Teachers. And no, there is a difference between private and govt colleges. The private institutes do not offer the kind of job guaranty govt ones do, so they can fire a teacher if they think he is teaching below par or forcing students to come for private tuition to him.