The original account from Patrick Brenner highlights how 403(b) participants remain confined to public-market mutual funds while institutions allocate 20-30% to private equity and credit. Primary documents reveal the structural roots: ERISA of 1974 established fiduciary duties that courts have interpreted to prioritize documented prudence, producing defensive plan menus. The Department of Labor's proposed rule introduces an asset-neutral safe-harbor framework evaluating fees, liquidity, valuation, and benchmarks, explicitly referencing the Council of Economic Advisers observation that younger participants could gain from limited private-market exposure. One perspective holds that such access could offset documented shortfalls driven by housing-cost growth and extended longevity; an opposing view, reflected in prior regulatory caution, emphasizes potential illiquidity and fee layers for non-professional investors. Neither the source nor secondary commentary directly engages the 1974 statute's text or the rule's 15-percent-cap language, both of which shape plan-sponsor behavior more than litigation anecdotes alone. Institutional precedent under ERISA-covered public plans demonstrates feasible implementation when governance capacity exists, yet defined-contribution participants lack equivalent structures. The mismatch between static retirement vehicles and post-1974 capital-market evolution therefore centers on statutory interpretation rather than investment menus per se.