>So if you believe in humans as rational economic actors, 1) They're not. 2) Even if they were, it may be the case they are short-term biased, meaning they're

>So if you believe in humans as rational economic actors, 1) They're not. 2) Even if they were, it may be the case they are short-term biased, meaning they're willing to forgo $20 tomorrow for $10 today.