Mandatory Prevailing Wage Rules Inflate Public Infrastructure Bids by Restricting Competition

Minimum wage laws set a universal floor for all employers in a market, applying a single hourly rate equally to every firm. Prevailing wage mandates operate on an entirely different mechanism. Rather than a simple wage floor, they impose a complex, union-derived compensation structure exclusively on firms bidding for taxpayer-funded public works.

This distinction is the central driver of inflated infrastructure costs across the United States. When a state or federal government requires contractors to pay the prevailing wage, it is not merely asking them to pay their workers more. It is forcing non-union firms to adopt a foreign business model overnight, complete with rigid job classifications and specific fringe benefit allocations.

For many open-shop contractors, the administrative burden of restructuring their payroll to mirror union contracts is simply not worth the effort. They choose not to bid on public projects at all. This predictable exodus of non-union bidders hollows out the competitive landscape, leaving a smaller pool of firms to compete for lucrative government contracts.

With fewer rivals submitting proposals, the remaining bidders—typically unionized firms or large contractors with dedicated compliance departments—gain significant pricing power. They can submit higher bids without fear of being undercut by a leaner, more efficient competitor. The taxpayer ultimately absorbs this premium, paying for both the higher wages and the lack of market competition.

The Anatomy of a Prevailing Wage

To understand how this mechanism restricts competition, one must look at how prevailing wages are calculated. In many jurisdictions, the mandated rate is not an average of what all local construction workers earn. Instead, it is often a direct rubber stamp of the nearest applicable collective bargaining agreement.

In heavily unionized trades, the modal rate—the single rate paid to the greatest number of workers—virtually guarantees the union scale becomes the legal floor. But the mandate extends far beyond the hourly paycheck. Prevailing wage rules typically require contractors to match union fringe benefits, such as specific health insurance plans, pension contributions, and apprenticeship training funds.

Non-union firms usually compensate their employees differently, relying on profit-sharing, year-end bonuses, or alternative retirement vehicles. Converting an open-shop compensation package into a prevailing wage format is a logistical minefield.

A non-union contractor cannot simply pay their workers a higher hourly rate to offset the missing union benefits; they must itemize and prove that their alternative benefits meet the exact statutory equivalent. Many firms simply lack the back-office infrastructure to manage this compliance risk.

The Exodus of Open-Shop Bidders

Faced with the threat of costly audits and compliance penalties, a significant portion of the construction industry simply opts out of public works. This is not a marginal phenomenon. In many states, non-union workers make up the vast majority of the private residential and commercial construction workforce.

When these firms refuse to bid on schools, roads, and municipal buildings, the government loses access to the most competitive segment of the market. The bidding pool shrinks to a self-selecting group of contractors whose existing business models already align with the prevailing wage requirements.

The National Bureau of Economic Research examined the consequences of this dynamic by studying states that repealed their prevailing wage laws in the 1970s and 1980s. The researchers found that repeal led to a 10 percentage point decline in the long-run union wage premium earned by construction workers.[2]

This drop in the union premium illustrates the artificial pricing power that prevailing wage laws grant to organized labor. Without the mandate shielding them from open-shop competition, unionized firms were forced to lower their bids to remain competitive. The NBER study also noted that repeal significantly narrowed the wage differential between black and non-black construction workers.[2]

Quantifying the Infrastructure Premium

The cost of this restricted competition is staggering. Multiple state-level analyses have attempted to quantify the premium taxpayers pay for prevailing wage mandates, and the figures consistently outpace the direct cost of the higher wages themselves.[4]

A 2023 study by the Mackinac Center for Public Policy examined the impact of prevailing wage laws on road construction across several states. The analysis found that these mandates increased the cost of road construction by 8.5 to 14.3 percent. In Michigan, this translated to an unnecessary increase of up to $9,200 per mile of road.[1]

The inflation is even more pronounced in vertical construction. A 2017 report by the Empire Center for Public Policy evaluated the impact of prevailing wage requirements on publicly funded building projects in New York. The researchers concluded that the mandate boosted total building costs by 15 to 25 percent, depending on the region.

In New York City alone, the Empire Center estimated that prevailing wage rules would inflate school construction costs by $1.4 billion over a five-year period. These are funds that could have been used to build additional classrooms, hire more teachers, or reduce the local property tax burden. Instead, they were absorbed by inflated construction bids.

The Defense of the Mandate

Proponents of prevailing wage laws argue that the mandates are necessary to prevent a race to the bottom in public procurement. Labor advocates note that in a lowest-bid model, contractors are incentivized to cut labor costs as much as possible to win the contract.[4]

Without a wage floor, advocates argue, out-of-state contractors from lower-wage regions could enter local markets and undercut existing firms. This dynamic would theoretically erode local labor standards, reduce worker training, and compromise the quality of the finished infrastructure.[4]

The Economic Policy Institute has also published research challenging the idea that prevailing wage laws inflate costs. Their analysts argue that higher wages attract more skilled, productive workers, which offsets the increased hourly rate through faster project completion and fewer costly errors.[3]

Furthermore, supporters contend that prevailing wage laws level the playing field by forcing contractors to compete on management efficiency and technological innovation, rather than simply exploiting the cheapest available labor. From this perspective, the mandate is a feature of responsible government spending, not a bug.[3]

The Reality of the Bidding Process

While the productivity argument holds theoretical appeal, it fails to account for the reality of how construction bids are formulated. If higher wages genuinely paid for themselves through increased efficiency, unionized firms would routinely outcompete non-union firms in the private sector without the need for a government mandate.[4]

In practice, the private commercial market does not universally adopt prevailing wage standards. Private developers, who are highly motivated to balance cost and quality, frequently award contracts to open-shop firms. It is only in the public sector, where the government dictates the terms of competition, that these specific compensation structures are mandated.[4]

The core issue remains the restriction of the bidder pool. When a government agency publishes a request for proposals, the surest way to secure a competitive price is to attract as many qualified bidders as possible. Every administrative barrier placed between a contractor and a bid reduces that competition.[4]

By imposing a compensation model that is fundamentally alien to a large segment of the construction industry, prevailing wage laws act as a targeted barrier to entry. They protect a specific class of contractors from the full force of market competition, ensuring that public infrastructure remains artificially expensive.[4]

The Path to Competitive Procurement

Governments seeking to stretch their infrastructure budgets must reckon with the cost of these mandates. As federal and state agencies prepare to deploy billions of dollars for new roads, bridges, and transit systems, the efficiency of public procurement has never been more critical.[4]

Repealing or reforming prevailing wage laws would immediately expand the pool of eligible contractors. Open-shop firms, freed from the risk of fringe-benefit audits and rigid job classifications, could bring their leaner business models to the public sector.[4]

This influx of new competition would force existing government contractors to sharpen their pencils. The resulting bids would reflect the true market cost of construction, rather than an artificially inflated rate designed to protect a specific labor model.[4]

Ultimately, public infrastructure is funded by the taxpayer, and the taxpayer deserves the maximum return on their investment. Ensuring that every qualified contractor has a genuine opportunity to compete is the only way to guarantee that public funds are spent efficiently.[4]