Here’s Thomas Sowell from his book Basic Economics:
The fundamental principles of economics are not hard to understand, but they are easy to forget, especially amid the heady rhetoric of politics and the media. [emphasis added]
I sometimes think that listening to politicians and bureaucrats talking about economic issues is like learning a board game from a kid. The kid never remembers all the rules at once, and seems to conveniently forget or remember them most often when it’s self-serving.
Via Café Hayek.