Imagine if you will, some faceless government bureaucrat sees that you made a comment that was unflattering to his daughter. With the click of a button, you are made penniless.
Or perhaps they are just keeping an eye on you. So they log into the central dollar database to see where you are spending your money, and what you are buying.
A system like a social credit score could allow the government to control everything you do and say, upon penalty of being made a financial pariah.
It’s easy when the US has an all digital currency, which the US Federal reserve and some major banks just began testing.