So that's why I go broke on vacations... I want to eat somewhere cheap and the wife says, "No, let's go to the expensive joint... we've already spent $x getting here, so an extra $50 won't make a difference!" Now I have a name for the phenomena.
No. The sunk cost comes into play in explaining why we've gone to Disney World three time too many simply because we bought some multi-day package years ago. I hate Disney. She hates Dianey. But, we gotta use up the stinking tickets.