I'm not suggesting that this is the only reason why more anger is not visible, but surely it must account for a degree of it: https://novaramedia.com/2020/06/20/why-does-the-police-exist...

Wherever one looks at the origins of the police (and prisons), one finds they “develop hand in hand with social inequality and hierarchy”, as Robert Reiner, the UK’s leading scholar of police, explains. The police is, he writes, a “means for the emergence and protection of more centralised and dominant class and state systems”.