But his needs (food, shelter,...) only had to be met for 5 minutes, while he could have invested money and earned interest for 5 days. This is a minor plot poin

But his needs (food, shelter,...) only had to be met for 5 minutes, while he could have invested money and earned interest for 5 days. This is a minor plot point in Orson Scott Card's Ender series, and in Futurama.