Not really, it's more about product differentiation.
Why do cheaper Ibanez have inferior Floyds? Because they are cheaper to produce...? No, not really, there is no significant difference in production costs for Ibanez. It's product differentiation, the same way you say big name pickups on higher-priced guitars. And cases are another little thing that helps the customer understand what he is paying the higher price for: a premium guitar vs an affordable mid-price guitar.