There are several money making industry here in Nepal like Social working,Governemtal Job and still they chose to become a teacher

Research properly friend. Those government officers don't earn much(corruption is not source of income, it is a crime; and almost all get caught at the end).

Nobody becomes a teacher given that they could do government job in Nepal. Although salary of teacher might be somehow more(but depends on which subject he is taking).

I agree that teaching should be a passion. But, we don't need to wait for good and passionate teachers, we are living in a time where everything is digital. If we really wanted change, we could replace those teachers with online teachers. If that doesn't work better, we can always revert back.