Only two countries have gotten to 1 billion inhabitants, and I'd say that the government of India is much less callous or calculating than that of China.
The founders of Communist Russia intended that the state be dissolved by 1980, that it be replaced by councils that work together in coöperation, such that everyone has a say. Did that bear fruit? No.
Did the founding fathers intend for the United States to spy on every single one of their citizens? No. Does it happen? Yes. Did the founding fathers intend for the state to be able to detain foreigners of the US indefinitely without trial? No. The patriot act allows it, however.
You cannot judge a country by founding principals and safeguards alone, they are easy to repeal and change; you can only judge a country on the current legislature and how much the current Constitution constrains the government.
Well, Campbell's law...
> "The more any quantitative social indicator is used for social decision-making, the more subject it will be to corruption pressures and the more apt it will be to distort and corrupt the social processes it is intended to monitor."
System errors: falsely attributing you with certain penalties (or credits). The workaround here is the same as with a bank - provide a statement and a mechanism to dispute entries.
Fine errors: penalising you when you don't deserve it. This is like anything else in the justice system, although it has the advantage that it should be an accumulation of a larger number of smaller inputs (positive and negative), so individual errors should act like noise and remain negligible.
I seriously doubt that the Chinese government is interested in inviting dispute. Dispute is exactly what such a surveillance system is designed to suppress.
If you have 1000 million citizens, your social credit computation better have a sub-ppm false positive rate, or else you risk ostracizing thousands of innocent people.
Maybe on the whole it's worth it for the Chinese government.
Also, I wonder if increasing adoption of this system will create a black market of 'score hackers', people that try to fuzz the algo's into giving free or cheap social credit....