I'd presume that many people's preferences include terms for the expected well-being of their descendants.
That's a get out of utilitarianism free card. Many people's preferences include terms for acting in accordance with their own nonutilitarian moral systems.
Haven't had one of these for awhile. This thread is for questions or comments that you've felt silly about not knowing/understanding. Let's try to exchange info that seems obvious, knowing that due to the illusion of transparency it really isn't so obvious!