I’ve wondered about this many times, but never thought there would be an answer. The author says, “Here’s what sums it up to me: When professionals retire, we keep dabbling. The retired newspaper editor in my hometown still writes. When the professor retires, he’ll keep reading journals and going to talks. But in the thirty years since my Dad took early retirement, he has never brought home some fish oil and mixed up a batch of cattle feed in the garage. When you retire from Wal-Mart, you don’t set up a bar-code scanner in the basement, just to stay busy. You do that stuff for money, and when they stop paying you, you never, ever do it again. The different need, he says, also drives differences in religion. I would guess also politics.