I'm not sure about the context of that Kennedy quote, but as presented it doesn't read as a case for redefining GD(or N)P, but rather as a reason not to take it

I'm not sure about the context of that Kennedy quote, but as presented it doesn't read as a case for redefining GD(or N)P, but rather as a reason not to take it as a measure of the success of society. I think that's correct, and the present blog post comes to a similar conclusion at the end.