I would not object to the school authorities spanking my child, though I or my wife would be present.
As long as I agreed and was present, then I agree. However, if I did not agree like this parent did not, I’d have decked that a$$hole principal.
Except that I would get first crack at it. They could watch me paddle my own kid.
That would be the perfect situation, to show the child that the parents agree, and it will not be tolerated.