The Wall Street Journal reported in July 2026 that Costco Wholesale’s automatic 9% contribution for workers with 25 or more years of service has helped thousands of front-line hourly employees amass over $1 million in their 401(k) accounts. The story is real. It is also a distraction. Vanguard data cited in the same report shows the average employer match stands at 4.7% of eligible salary and only 6% of plans offered a match of 7% or above in 2025. Meanwhile, roughly 57 million private-sector workers — almost half the private workforce — have no workplace retirement plan at all, according to the National Institute on Retirement Security. The gap between the bargained tier and the zero-access condition is the landscape’s defining asymmetry.

Two structural drivers produce the dispersion. The first is sector-determined operating margins. Costco funds its 9% nonelective contribution from the high per-employee revenue of a membership-driven retail model. Visa and Mastercard both reach 10% total contributions through the extraordinary margins of the credit-card network business. Boeing provides 10% of pay through the cost-plus structure of government defense contracts. Southwest Airlines offered a dollar-for-dollar match of up to 9.3% of salaries in 2024. Stewart’s Shops’ 17% average ESOP contribution over five years depends on equity appreciation unavailable to firms without closely held stock. The margin-to-contribution link is mechanism-level: margins fund contributions, and margins are downstream of sector position, not employer discretion.

The second driver is voluntary plan design under a permissive regulatory framework. The Employee Retirement Income Security Act of 1974 sets standards for plans that exist but creates no requirement that employers offer one. The SECURE 2.0 Act of 2022 demonstrates that federal legislation can alter plan design — it enabled student-loan matching, adopted by Boeing, Verizon, Chipotle, Comcast, Walgreens, and News Corp — but it encourages rather than mandates. Costco’s strength lies in a 4% nonelective auto-contribution that reaches workers who would not otherwise contribute, augmented by a small match of up to $500 annually on a $1,000 worker contribution and a one-year service threshold. Altria Group combines a 3% match with a profit-sharing plan to deliver 13% to 17% of pay. The Aerospace Corp., a nonprofit government contractor, uses a 3% match with additional nonelective contributions to reach 12% for the longest-tenured employees. Ford and General Motors raised unionized workers’ nonelective contributions from 6.4% to 10% — a 56% jump — through the 2023 UAW contract negotiations. Ford and GM transitioned away from pensions for new hires about two decades ago; the 10% bump is the leveraged substitute for what was lost. Of the plans Vanguard tracked, 37% use both matching and nonelective contributions and 11% use nonelective alone. Chris West, a managing director at the HR consulting firm WTW, described high matching rates on the record: “It’s distinctive. It probably creates really strong incentives for employees to contribute. It’s also really easy to communicate.”

The two drivers converge at the uncovered firm. A business without a plan simultaneously lacks the margins to fund one, the design knowledge to structure one, the regulatory mandate requiring one, and the administrative infrastructure to administer one. These are not sequential causes but convergent barriers. Addressing any single driver without the others produces partial relief at best.

The evidence for the load-bearing links carries different weights. The sector-margin-to-contribution link is mechanism-level but lacks sector-level econometric evidence controlling for firm-culture proxies. The Vanguard aggregate figures are descriptive statistics from plans it manages, not causal inference. The 57 million uncovered figure describes the distributional outcome, not a causal mechanism. Costco’s retention strategy is actor self-report, not a controlled study — a difference-in-differences study comparing Costco stores with staggered contribution rollout timing, controlling for wage and healthcare differences, would be needed to move from mechanism-plus-correlation to mechanism-demonstrated. The source distinguishes mechanism-asserted-by-expert (West’s testimony) from mechanism-demonstrated and does not conflate the two.

The system’s central asymmetry is power. The parties with the most power and the most immediate interest — large employers in tight labor markets — are the ones designing and funding the generous plans. Costco, Boeing, Ford, General Motors, and Altria are the high-power, high-interest actors. Costco’s 9% sits on top of a stated retention strategy — keeping turnover low reduces training costs and improves customer service — supported by higher-than-normal wages and inexpensive healthcare. Boeing’s 10% varies by job classification and union agreement, reflecting its need to hold specialized labor. Visa, Mastercard, and Southwest Airlines occupy a similar position: their matching structures are designed to attract talent in sectors where turnover carries high costs.

The 57 million uncovered workers are a dangerous stakeholder group: high legitimacy — the right to a secure retirement — and high urgency — they lack access entirely — but low power. They have no direct leverage over any employer in the report. Declining private-sector union density reduces their capacity to negotiate retirement terms collectively. The 2023 UAW contracts at Ford and GM illustrate what organized labor can extract; the widening gap between unionized auto workers and non-unionized workers at the same companies illustrates the consequences of its absence.

The IRS, the silent structural actor that shapes contribution limits and non-discrimination testing, is never named in the coverage debate. Its rules determine which plans employers find worthwhile to offer — and which the 57 million cannot benefit from. Fidelity and T. Rowe Price, the structural competitors to Vanguard in the plan-administration market, are also absent from the framing. The benchmark data itself reflects plans Vanguard manages, and other administrators’ books may show different patterns.

The central paradox is that the headlines describe the tail of the distribution, not its center. Costco front-line millionaires, Publix cashiers who became millionaires through ESOP ownership after clocking 1,000 hours in a year, and Stewart’s Shops’ 200 millionaires through ESOP-only ownership in Vermont and upstate New York are the visible stories. The median private-sector worker without a plan is invisible in that narrative. This signal-distribution mismatch is not merely a media phenomenon. It operates as a mechanism that preserves the status quo by making the system appear more generous than it is. Employer-provided retirement is a labor-market prize, not a universal right.

Over the next three to five years, this asymmetry will harden without a federal intervention. The probability bands below are conditional on current institutional and market arrangements; structural unknowns — AI-driven employment restructuring, regime-change risk after the next federal election, behavioral responses of an untested elite-tier cohort to severe market decline — lie outside the banded range.

The most probable trajectory is continued widening. Employers in tight labor markets continue using automatic nonelective contributions as retention tools, extending the arms race visible at Costco, Altria, Boeing, Visa, Mastercard, and Southwest. SECURE 2.0’s student-loan-match feature remains adopted by a narrow set of large employers with HR infrastructure — Boeing, Verizon, Chipotle, Comcast, Walgreens, News Corp — while the 57 million uncovered workers remain structurally untouched. Probability band: 35% to 55%.

A federal auto-enrollment or auto-IRA mandate, modeled on SECURE 2.0’s precedent of attaching retirement policy to must-pass tax legislation, could extend coverage to a material share of the uncovered population. The risk is “access without adequacy”: default contribution rates set at the statutory minimum produce small-dollar balances that cannot fund retirement on their own. Probability band: 10% to 25%.

A significant economic contraction — potentially accelerated by AI-driven labor restructuring — would shift bargaining power away from workers. Costco’s retention logic becomes irrelevant when retention is no longer the binding problem. Ford and GM’s 10% becomes a cost line targeted in the next contract cycle. Elite-tier contributions compress toward the mean; the uncovered tier stays uncovered. Probability band: 5% to 20%.

A partial return of defined-benefit pension elements would reverse the decades-long shift toward defined-contribution-only plans. The 2023 UAW contracts serve as a counter-signal: they explicitly traded pension reinstatement for the 10% nonelective 401(k) contribution, reinforcing the DC trajectory. Probability band: 0% to 15%.

Several variables determine which trajectory materializes. Federal auto-enrollment mandate legislation — watch Senate Finance Committee activity and whether retirement coverage gets attached to must-pass tax bills. Vanguard’s annual match-rate survey — rises above 5% means convergence; holds at or below 4.7% means bifurcation. The Ford/GM 2027-2028 contract cycle — the 10% surviving signals elite-tier resilience; a reduction signals recession pullback. State auto-IRA median balance trajectories in California, Oregon, and Illinois — stable or growing builds the case for a federal mandate; stagnant or low undercuts it.

Two failure pathways are worth flagging. The first: a federal floor mandate set low enough that high-cost employers reduce discretionary contributions to match — the floor becomes a ceiling, recoverable only through new legislation. The second: an elite-tier fragility shock — Costco’s 9% cut to 6% during a margin squeeze, the most tenured workers leaving because they had the strongest alternative — recoverable over a full hiring cycle but with lasting trust costs.

The confidence levels across these findings vary. The core facts — Costco’s contribution tiers, Vanguard’s benchmark figures, the 57 million uncovered count, the SECURE 2.0 structure, the contribution levels at Boeing, Visa, Mastercard, Altria, Ford, GM, Publix, Stewart’s Shops, The Aerospace Corp., and Southwest, and the West quote — are all high-confidence, grounded in the Wall Street Journal source article. The probability bands for the scenarios and the failure pathways carry medium confidence — modeled, not observed. The recession-pullback and pension-return scenarios carry low confidence, reflecting disagreement on the activation conditions and the counter-signal from the 2023 UAW contracts. The finding that the signal-distribution mismatch suppresses political will is inferential synthesis consistent with the source evidence pattern but not directly sourced, and is accordingly low-confidence.

A reader following this landscape carries three questions. What happens to the 57 million workers without workplace retirement plans if a recession reduces employer willingness to maintain even modest benefits? Does a federal floor mandate risk becoming a ceiling if it is set low enough that high-cost employers reduce discretionary contributions to match? And if the state auto-IRA experiments in Oregon, California, and Illinois show that low default contribution rates produce inadequate balances, does that discredit the mandate model or reveal that the mandate was set too low?

For the roughly 57 million workers who have nothing, that last question — not the Costco millionaire story — is the one that matters.

Analytical techniques used in this piece

This analysis applies the methods below. Each links to a short, plain-English explainer you can read and reuse.

Root-Cause Analysis
Traces a symptom back along its causal chain to the conditions that actually generated it.
Stakeholder Mapping
Charts the parties to a situation — their interests, power, and alignments.
Wicked Futures
Explores a long-horizon, deeply entangled future with no clean resolution.