I imagine you want to make the point that primary School education is more important than secondary School education (which may be true) and thus should be paid better.
I disagree with this in general, because I don't feel like the skills and knowledge needed to be a successful primary School educator are as difficult or unique as those needed to be a secondary School educator.
My reasoning is that a good percentage of the value that comes from primary School education is based around behavioural education, such as learning how to interact and behave with peers and teams. It also is a place where students learn authority and social heptarchy, and punishment and consequence. In addition to learning the foundations of school subjects.
In secondary education, it's assumed that the student has learned all that, and their attention will be focused on difficult study of each of their subjects. The professor should be an embodiment of that subject, with understanding beyond primary School educators. Likewise it's arguably more difficult to keep the attention of University students than primary students.
On the other hand (as in not in general), if someone was a truly exceptional primary educator / early life coach / babysitter, what have you, then the private sector would be a better place for them I imagine.
