Stan Druckenmiller makes an unlikely class warrior. He's a member of the 1%—make that the 0.001%—one of the most successful money managers of all time, and 60 years old to boot. But lately he has been touring college campuses promoting a message of income redistribution you don't hear out of Washington. It's how federal entitlements like Medicare and Social Security are letting Mr. Druckenmiller's generation rip off all those doting Barack Obama voters in Generation X, Y and Z.

"I have been shocked at the reception. I...