I think incentives have been a concern for some time now as they impact margins. With GM pushing hard on incentives to boost their volume, it's pulling everyone kicking and screaming into the game whether they like it or not.
They might want to (pay more) in the short term to avoid a strike. But if they're spending money now to gloss over the hard decisions that Delphi needs to make, they're only going to compound their problems when their turn comes up.