That is what the Yankees are preparing for. They just paid $52 million for Chase Headley to be their everyday 3B, so that leaves A-rod as the de-facto DH. So is he worth 60 million as a DH? No.
So why is Yankees management doing this to the team? It is simple: money. They are hoping that they can get some return on their investment, or that they can make insurance pick up some of the slack. This is just another reason why I miss the Boss. If he were alive, he would not allow money (its the Yanks for gods sake!) dictate what was most important: putting a strong Yankees team on the field that can win it all!