My hero is western tween born to rich emigres from fictional country, inspired by Romania. His parents escaped in the west, before demonstrators toppled the regime and took quite a wealth with them.
The tween is mysteriously transported in time, back in the late 70's, where the secret police arrests him, and due to his physical resemblance, they bring him to his grandfather, the feared chancellor.
The tween tells his grandfather that in a decade or so, Warsaw pact will fail and the mob will hang the regime including him for all the atrocities they've committed. The grandfather believes him, but tells him to keep quiet, the regime must control the population.
Basically government keeps a credit score on every citizen which is decided by the actions of you and your friends and family.
If you do things that government considers good it goes up. On the other hand if you listen foreign radio stations, protest, distribute anti-government literature etc it goes down.
Also if you keep company with low rating people they will drag down your rating. And if your family are rebellious types, you either reform them or report their every move to keep yourself in government good graces.
People with high ratings have perks such as better medical care, access to credit, faster bureaucratic procedures, bonus points on university entry exams etc.
People with low ratings are punished by banning them to buy trains, they're queued lowed for medical care, can't by anything on credit, limited at number of jobs they could hold , limited at education opportunities etc.
The main idea is that people will self police themselves, so people will ostracize troublemakers with low ratings, doing the secret police dirty work to keep their perks.
Could social score system be implemented without internet and with IT technology from the late 70's?