"An affluent neighborhood that privatizes trash pickup doesn’t marginalize the trash pickup in poorer neighborhoods — it increases the resources that are available for those neighborhoods."
The trick is this: justice is not trash. Police is not trash, security is not trash. There is a very important moral calculus and contract that goes into voluntarily submitting to society's laws.
We need to address the fact that we've lost faith in our governments, and that we don't depend on our .gov to provide for our needs, and that we don't believe in the contract anymore. This is a short-sighted sort of fix, and one that is only going to lay the groundwork for a much, much messier attempt at resolution. We need to fix the .gov.
There's always been a kind of wink and nod that yes, the .gov can do better, and yes, we can't all be astronauts, but allowing such direct coupling of personal wealth and policy is quite tacky.
EDIT: Removed ranty bit.