> but not so much that their greed creates an even worse system.

The market model won't work because greed isn't real when discussing corporations. That's like calling a tree growing towards the sun "greedy." No, the tree is fulfilling it's biological imperative: put more leaves closer to the sun.

Corporations must maximize profit. The corporation that maximizes profit best is the one that can consume other ones and tend towards monopoly, the perfect state. All actions are permitted when fulfilling biological imperative.

So, trying to fenangle a market based solution to police brutality issues will result in a couple predetermined outcomes: insurance payouts won't happen because why would they voluntarily pay, furthermore, cop insurance companies would leverage their superior capital to lobby the government to protect their profit margins, which individuals can't prevent through market efforts or individual actions since the corporation's power is so much greater.