Take the example of the McDonald's chain of restaurants. Where is the irrationality? The premise of fast food often turns out to be just the opposite - long waits in lines. Fast food is not necessarily good food - in fact, McDonald's food is extremely unhealthy and the taste is average and bland. The system of efficiently producing and distributing their food has some other consequences, namely millions of tons of trash each year (disposability) and a food cultivation system of questionable ethics.