This caste system is naturally what happens with a huge influx of money into a constrained job and housing market. If there was way more low cost housing, more people outside of the Inner and Outer Parties could make their own sort of life in the interstices, engaging in commerce and creating in those interstices. With the constrained housing market, the interstices disappear, and the economic entities in the markets created by them either disappear or adjust to serve the Inner and Outer parties.

Add into that, a culture of conformity of thought and ideology in the Inner and Outer parties, and the analogy with the two models is complete. https://en.wikipedia.org/wiki/Manufacturing_Consent -- Wherein 1980's America managed to produce an analog of Pravda-esque propaganda, but without sending people to Gulags, without airbrushing photos, and without outright censorship. Instead, the mechanisms are technically "Free Market." Now 2018 San Francisco is inventing another analogue through free market mechanisms.