You'd destabilise the whole second hand car market if you did that.
New cars from the fields would be cheaper than the nearly new cars on forecourts.
The nearly new wouldn't sell and they'd end up in the field instead.

The fields of cars will empty over the next few months as most makers have stopped or reduced production.

Production will restart and be matched to the demand.

They only need propping up to cover the next few months whilst the situation sorts itself out.

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