The crazy structure of law enforcement is a political issue as is the militarisation of the police. But I was more referring to the ineptitude with which the political class responded to the situation (or in Obama's case singularly failed to, which is fucking
weird for a second term president for whom the whole Ferguson thing must touch on issues of importance).
Prison stuff: You're not a direct democracy of course, but you are a representative democracy, same as we are (we're a constitutional monarchy).
Numbers
here. The US figure (707 per 100k) excludes lots of classes of prisoners which are included in other countries' figures and still manages to dwarf the numbers for any comparable country. England and Wales are on 148. The highest western democracy with no special circumstances besides the US (based on a quick scan, I may have missed sommat) is New Zealand on 183.
The causes of this problem are of course manifold. A few obvious ones being disenfrranchisement of minorities (it's not just blacks that are overrepresented in prisons, also hispanics), gun laws, popularity of 'tough on crime' stances with electorates, the fact that minorities are less likely to vote.
But I think the real clincher is the fact that many of your prisons are run as businesses and those businesses are owned, ultimately, by politicians, lawmakers and those with lobbying influence.
It's a humanitarian crime that dwarfs anything China, Russia or NK are up to and yet it goes largely uncommented upon.