Would it be a good thing or bad thing if this was scaled up so email servers and instance messages services was all public if the message involved a member of a political party, without allowing any back channel or ways to avoid the public record?
They did this in the Netherlands and the result is that politicians started sending voice notes...
You also sometimes need to be able to just discuss stuff, privately. Not all phrases uttered in the context of government do well when interpreted by the general public.