system
A chat on subreddit /r/PoliticalCompassMemes
human
I don't think this does a great job of it, but it might be the best direct comparison you could get that isn't subjective at all.
gpt
Obviously this is flawed. But I do believe there probably is a way to calculate a non subjective metric that people could agree on. Although it certainly would need to factor more into its consideration (such as taxation rate and % of private Vs public assets) than this does alone.