Who Actually Benefits From Mass Immigration
The United States added roughly 32 million foreign-born residents since 1990. The gains concentrated among employers, high-immigration metros, and the political class, while the costs fell on the workers and renters already here.
Key Findings
The foreign-born population rose from 19.8 million in 1990 to 51.6 million in 2024, an increase of about 32 million people. An arrival that large produces winners and losers, but the public debate usually treats the gains and the costs as if they reach the same households. They do not. The gains are concentrated and the costs are spread thin.
The National Academies of Sciences found that immigration has little measurable effect on the wages of the average native worker over the long run. The same study found the negative effects that do exist are concentrated on prior immigrants and on native-born workers without a high school diploma. These are the people with the least room to absorb a pay cut.
About 25 million immigrants have naturalized since 1990, and by 2020 the Pew Research Center counted 23.2 million naturalized citizens eligible to vote, one in ten of the electorate. Economists studying county-level data find the political effect of immigration runs through naturalization, shifting local vote shares where naturalization rates are high.
The central question is not whether immigrants can contribute. Many do, and their children often contribute more. The question is who captures the gains and who pays the costs, and whether the system is designed so the benefits reach the people already living here.
The United States ran the largest sustained immigration wave in its history over the past three decades. The foreign-born population more than doubled, from 19.8 million in 1990 to 51.6 million in 2024.[1] By that year the foreign-born share of the population reached 15.6 percent, near the highest level on record.[1]
A change that size creates a ledger of winners and losers. The argument for mass immigration tends to describe one side of that ledger. A full accounting has to describe both.
The employer's ledger
A larger labor supply lowers the price of labor. That is the clearest gain, and it goes to the firms that hire at the bottom of the wage scale. Agriculture, construction, meatpacking, warehousing, and hospitality run on it.
The aggregate wage effect on native workers is small. The National Academies reviewed the literature and concluded that immigration has little long-run impact on the wages or employment of native workers as a whole.[2] That finding is real, and it is often where the debate stops.
It is not where the ledger stops. The same review found the negative effects are concentrated rather than absent. They fall on earlier immigrants and on native-born workers without a high school diploma.[2] George Borjas estimates that immigration reduced wages for that least-educated group by several percentage points over the decades of high inflow.[3]
The worker who loses a few percent of an already low wage does not show up in the national average. The employer who saves on payroll does show up, on the balance sheet.
The district's ledger
Where immigrants settle, the local economy grows. More residents mean more consumer demand and a wider tax base. Cities that receive immigrants gain population at a time when much of the country is aging and shrinking.
The fiscal picture is mixed and depends on time horizon. First-generation immigrants cost state and local governments more than they pay in, mostly because of the cost of educating their children.[2] Their adult children then rank among the stronger fiscal contributors in the population.[2] The bill and the payoff arrive in different decades, and often in different jurisdictions.
One benefit is fixed in the Constitution. The census counts every resident for the apportionment of House seats and Electoral College votes, citizen or not.[7] States with large immigrant populations gain seats and electoral weight regardless of how many of those residents can vote. The representation shifts toward the places that receive immigration and away from the places that do not.
The political ledger
Naturalization converts arrivals into voters. About 25 million people have naturalized since 1990. By 2020 the Pew Research Center counted 23.2 million naturalized citizens eligible to vote.[4]
The effect on elections is measurable. Anna Maria Mayda, Giovanni Peri, and Walter Steingress examined county-level data and found that the political impact of immigration operates through citizenship. Where arriving immigrants naturalize at high rates, local vote shares move toward the Democratic Party.[5] The effect is strongest among higher-skilled arrivals.
This is not a hidden conspiracy. It is the ordinary arithmetic of adding voters to specific places. The point is that the political class in those places has a direct stake in the inflow continuing, separate from whether it serves the residents already there.
The costs that never get booked
The costs land on people who are hard to count as a group. A renter pays a little more. A first-time buyer waits a few more years. A school adds a few more students per class. Each effect is small for any one household and large in aggregate.
Housing is the clearest case. Half of all renter households now spend more than 30 percent of their income on rent, a record share.[6] Adding population to a metro raises demand for housing faster than supply can respond, and the people competing hardest for that housing are the lower-income residents already there. The same logic that makes a city attractive to investors makes it expensive for its workers.
These costs are diffuse by nature. They do not generate a lobby. The gains do.
Assimilation as the missing variable
The standard defense of high immigration is that newcomers assimilate and their children integrate fully. The evidence shows that this can happen. It also shows it does not happen automatically.
When arrivals are large, geographically concentrated, and culturally distant from the host population, integration slows. Parallel communities form, language persists across generations, and the shared civic culture that holds a country together thins out.
History shows the same dynamic running the other direction. French Catholic settlers lived in Algeria and Morocco for generations among an Arab-Muslim majority without ever merging into it.[8] The religious and cultural distance held on both sides. This is not a claim that one population was worth more than another. Shared institutions require shared expectations, and those have to be built deliberately rather than assumed.
Current American policy assumes assimilation instead of requiring it. The naturalization standard rests on a basic English test and a civics quiz drawn from a published list of questions, a standard built for a far smaller system.[4] Volume rose; the integration requirements did not.
What would change the math
The fix is not to treat any group as a threat. It is to design a system whose benefits reach the citizens already here.
That means lower and more sustainable admission levels, so integration can keep pace with arrival. It means real assimilation standards: functional English, genuine civic knowledge, and a longer path to citizenship. It means dispersing resettlement rather than concentrating it, and enforcing the law at the border so the incentive for illegal entry disappears.
An immigration system can serve a country or it can serve the narrow set of interests that profit from its current shape. The two are not the same, and the past three decades have shown which one the present system is built for.
Sources
- Migration Policy Institute, Frequently Requested Statistics on Immigrants and Immigration in the United States; U.S. Census Bureau, foreign-born population at 51.6 million and 15.6% in 2024 - foreign-born population 19.8 million (1990) to 51.6 million (2024)
- National Academies of Sciences, Engineering, and Medicine, The Economic and Fiscal Consequences of Immigration (2017) - wage effects concentrated on prior immigrants and natives without a high school diploma; fiscal cost of the first generation, contribution of the second
- George J. Borjas, "The Labor Demand Curve Is Downward Sloping," Quarterly Journal of Economics (NBER Working Paper 9755) - estimated wage losses for the least-educated native workers
- Pew Research Center, "Naturalized Citizens Make Up Record One-in-Ten U.S. Eligible Voters in 2020" - 23.2 million naturalized citizens eligible to vote
- Anna Maria Mayda, Giovanni Peri, and Walter Steingress, "The Political Impact of Immigration: Evidence from the United States," American Economic Journal: Applied Economics - political effect of immigration runs through naturalization
- Harvard Joint Center for Housing Studies, The State of the Nation's Housing 2024 - record share of cost-burdened renter households
- U.S. Census Bureau, Congressional Apportionment - apportionment counts all residents regardless of citizenship
- Migration Policy Institute, "A Century Later, the 1924 U.S. Immigration Law's Far-Reaching Impact"; historical settler-population estimates for French North Africa