What If We Were Graded By Loyalty?

I was reading yet another story in The Economist HERE about the repressive North Korean government. I actually found it relatively unremarkable except for these two sentences, which intrigued me.

"With totalitarian obsession, it groups North Koreans into 51 social categories, graded by loyalty to the regime. Of those groups, 29 are considered to make up an underclass that is hostile or at best ambivalent towards the regime."

I found myself wondering momentarily how that classification scheme might apply in the United States.