Steve Stewart-Williams Ph.D.

The Nature-Nurture-Nietzsche Blog

Why Do Politicians Say Dumb Things?

Sometimes it's smart to be stupid

Posted Sep 05, 2015

The ethicist and political thinker Jason Brennan has an interesting piece over at the Princeton University Press Blog. In it, he tackles the age-old question of why politicians - many of whom are probably quite smart - often say some pretty non-smart stuff.

The gist of his answer is this: Saying stupid things to voters is smart because voters are uninformed... and being uninformed is smart because your vote will almost certainly make no difference. (!)

In other words, it's all about responding rationally to the incentives created by democracy.

Here's an excerpt:

Politicians are trying to win elections. To win elections, they need to get the most votes. To do that, they need to appeal to as many voters as possible. In an election, what every smart politician is trying to do is behave in ways that he or she hopes will appeal to the typical voter. Politicians are like this because they respond rationally to the incentives democracy creates.

 If voters were well-informed, dispassionate policy-wonks, then political campaigns would resemble peer-reviewed economics journals. But few voters or potential voters are like that. As I’ll document at greater length in future blog posts here, most voters are poorly informed, passionate, biased, overconfident, and tribalistic. Most non-voters are not dispassionate truth-seekers; rather, they just don’t care much at all.

Voters are like this because they respond rationally to the incentives democracy creates. The problem is that our individual votes count for very little. Economists and political scientists debate just how to calculate the probability that your vote will make a difference. Still, even on the most optimistic estimate in the literature, your vote (in a presidential election) has a 1 in 10 million chance of making a difference, but only if you live one of handful of swing states and vote Democrat or Republican. Otherwise, your vote has no real chance of mattering. Polls show that citizens more or less realize this.

Voters do not consume much information, nor do they discipline themselves to think rationally about the information they consume, because their votes make little difference. As economists like to say, voters are rationally ignorant. Consider, as an analogy. Suppose a billionaire offers you a million dollars if you can ace the Advance Placement Economics and Political Science exams. You’d probably be willing to learn basic economics and political science for that price. But now suppose the billionaire instead offers you a 1 in 20 million chance of earning that million dollars if you ace the exams. Now it’s not worth your time—it doesn’t pay to learn economics or political science.

You can read the whole thing here.

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