Why does Amazon owe 99% of sellers money?

Lost and Damaged Units

Damaged inventory at the warehouse
Destroyed item without permission
Lost inventory at the warehouse
Carrier damaged inbound shipments in transit

Lost Inbound Shipments

Lesser reimbursement for quantity
Insufficient reimbursement value
Chargeback issued without refund
Failure to return items to inventory

FBA Fee Overages

Correct inaccurate weights and dimensions
Reimbursement for past overages

Customer Returns

Item not returned
Item returned outside of return window
Different item returned