A quarter century ago, by a pre-white-haired John O’Sullivan, for The Foundation for Economic Education. Very rewarding to listen. For example, a bit over an hour into it, he makes the point that unions that force up wages in one industry will divert capital into that industry, taking it away from workers in other industries. Earlier, his thoughts on the three sources of social norms–instinct, tradition, and intellectual theory–are well articulated, also.
Thanks to Don Boudreaux for the pointer.