Legal arbitration only makes sense when all parties involved voluntarily enter into a contract. With police arbitration, the public has no seat at the table. It's a system designed to protect police only.
The state currently enjoys a vastly unbalanced share of the power within a society, such an arrangement is not in any way preordained, and the assumption that it must be betrays a narrowness of vision and a lack of historical knowledge.
Thanks to past interventions, the economy is now rife with malinvestments and prices that don't reflect real demand. The solution is to allow deflation and other types of painful readjustment. Otherwise true growth will elude us.
Hacking off soldiers' limbs was a favorite technique of Civil War surgeons, largely because doctors wanted to avoid blame for later cases of gangrene. So doctors erred on the "safe" side. Many patients may have disagreed.