Some people, like me, believe retirement should be partly socialized. Others, such as Tucker Carlson, believe in a purely private system: If you don't save for your own retirement, your neighbor has no obligation to bail you out. Both arguments have roots in the American spirit: We are at once wonderfully communitarian and intensely individualistic. I felt then – and now – that rather than pretend there is not a major philosophical difference, or that there is one objectively perfect solution, we should debate our policy options vigorously.