What does this have to do with systematic abuse of specific groups? Criminals are people who break laws, they aren't a cultural group. They aren't some collection of people that are oppressed. I'd be impressed if you could show me some data showing that criminals (not prisoners) are systematically abused. What are you arguing for?
Thread ancestor said that the electorate was consistently handing out mandates to "brutalize a minority population".
The electorate's power to hand out such mandates is also the power that it uses to define who criminals are.
There can't be a check on that power without also opening up a huge can of worms for general law enforcement.
> Criminals are people who break laws, they aren't a cultural group.
If a majority hands out a mandate to oppress a minority group they can probably define the minority group to be criminals. In fact, there is a persuasive argument that that is happening.