This is sort of missing the point. If my employer wants to make my employment contingent on not entertaining subversive thoughts, they'll have a heck of a time

This is sort of missing the point. If my employer wants to make my employment contingent on not entertaining subversive thoughts, they'll have a heck of a time doing it today. Maybe they can e.g. devise some questionnaire or half-assed Voight-Kampff-style test that appeals to upper-middle-manager types with its high price tag and euphemistic-authoritarian marketing verbiage, but one has to imagine it would be fairly easy to fool. So from a certain perspective, it's not really worth worrying about. But then, when they figure out how to really make it work, we're already living in a society where the theoretical concept of it is completely mainstream and acceptable, and at that point what will stop it from becoming the new status quo?