I apologize if my thinking wasn't clear. Let me try a different way.
A lease is a financial structure with three inter-related components:
If, as @hcsharp suggests, the leasing company lowballs the residual value, the "put" option will provide little value and the depreciation charge will be substantial. In short, the lease payment will be high and the terms unattractive.
- A "put" option that allows you to sell the car back to the leasing company at a fixed price (the residual value);
- A depreciation charge that collects the decrease in the value of the car (purchase price - residual value), amortized over the life of the lease;
- An interest charge for carrying the unamortized portion of the vehicle value.
I forgot about the option. So basically low-balling the residual value will just be offset by the loss of value from the put option. They will essentially be stuck with all the cars if they have high depreciation, while the buyer holds the option if the cars keep value. I wonder who is backing the Volt lease which is surprisingly attractive.
Banks have to repo a certain number of cars and the percentage no doubt goes up if they depreciate fast. So they do bear some residual value risk yet the interest rates are the same for a Roadster as they are for a Corolla. Perhaps they require a larger down payment for riskier cars?