Some clarifications:

1. I am not trying to proselytize here (I can do that, but not in this case).

2. I am suggesting that a large complex system will be taken by special interests. And that Keynesianism needs a decent elite.

3. I would like to avoid "black and white", "all or nothing" scenarios. This is not between local primitivism vs total globalism. There are many models in-between, as far as the imagination can go. To be provocative, I would venture that the "nation-state" model worked well in Europe post-WWII. While not my model of choice, it seemed to have served us better than the EU/Euro model.

4. I actually think that some form of Keynesianism can work in times of scarcity. Nominal growth is a good thing (as in inflation protecting the workers vs the rentiers).

Keynes was, as far as I can see, a globalist. That part I do not believe it would work. This is irrespective of my likeness/dislikeness of the globalist idea.