Was there really a question? Or did our policymakers start from the required conclusion - the peasantry go back to work - and from there infer backwards to "their children need to go back to school so that said peasantry can go back to work"?

With that kind of thinking, I can understand that they don't actually have any idea about the transmission of Covid amongst children; they don't need that information as it has little bearing on the required conclusion.

I have presented something of a leading question. I know what I think the answer is.