As a piece of choice architecture, however, it suffered from a cumbersome design that impeded good decision making. It offered a menu with lots of choices, which is fine, but it had four major defects: • It gave participants little guidance to help them make the best selections from that menu. • Its default option for most seniors was nonenrollment. • It chose a default at random (!) for six million people who were automatically enrolled, and it actively resisted efforts to match people and plans based on their prescription drug histories.
