Pension Protection Act and the rise of auto-enrollment (2006)
Congress passed the Pension Protection Act, which gave employers legal cover to automatically enroll workers in 401(k) plans rather than requiring opt-in. Within a decade, auto-enrollment became the default at large employers, and 401(k) participation rates among eligible workers climbed sharply.
Participation in employer plans rose, especially among younger and lower-paid workers who had previously failed to enroll.
Auto-enrollment is now widely viewed as the single most effective retirement-policy intervention of the modern era—and a benchmark against which voluntary programs are measured.
The 2006 law worked because it changed the default, not because it created new incentives. The 2026 order relies on workers actively visiting a website and opening an account. Behavioral economics strongly suggests defaults beat portals.
