> Perhaps here lies the crux: nothing in the four freedoms seems to me like a license or rule of property, because none of them enforce scarcity. I got an impression that the author didn't oppose them on those grounds, but I might be misreading.

Author here. As a point of clarity, I oppose codifying the four freedoms into law because the only way to do it is under a regime of intellectual property. That is, it requires assuming, at some point, that ideas or intangible things are property.