School boards have no control over teacher salaries?

Tony Phyrillas laughs at school board members complaining about not having control over things like teacher salaries - you know, the salaries school boards establish (typically through labor contracts) for teachers.

Phyrillas ponders, "Why do we need school boards if they can't control costs?" Indeed the Goldwater Institute suggests we don't need school boards, or the bevy of school district administrators, at all, but should move to make all public schools operate as charter schools