If your only concern is teachers, then why does loan forgiveness apply to all kinds of government jobs, and not just teachers? Why is it all-or-nothing? All-or

If your only concern is teachers, then why does loan forgiveness apply to all kinds of government jobs, and not just teachers? Why is it all-or-nothing? All-or-nothing only makes sense because you can avoid accounting for the costs today, which is convenient for politicians. It's not convenient for teachers.