I'll gather current research on how unions affect workers and the wider economy to give you a balanced answer.
Labor unions have both benefits and costs for workers and the economy, and research finds mixed effects depending on industry, labor market competitiveness, and how unions are structured.
Benefits for Workers
Research generally finds a union wage premium for members:
•Higher wages and benefits: Unions raise the wages of their members by 10 to 15 percent. Unions also improve fringe benefits and workplace procedures such as retirement plans, workplace grievance policies, and predictable scheduling. More recent comparisons adjusting for other factors find the average union member earns roughly 15% more, and estimates correcting for data errors show 20% to 25% more than similar non-union workers, though other studies tracking the same worker over time find a smaller gain of 8% to 12% when taking a union job.
•Reduced inequality: Unions lift wages, reduce inequality, and shape how work is organized, among other effects. The Treasury Department report found unions help reduce race and gender wage gaps and have broad representation across demographics.
•Spillover effects: Unionization also has spillover effects that extend well beyond union workers, as competition means workers at nonunionized firms see increased wages too and heightened workplace safety norms can pull up whole industries. By setting a standard for working conditions, unions generate broader spillover benefits for all workers in industries with high rates of unionization — even if individual workers are not themselves in a union.
•Other workplace improvements: Unions are associated with greater access to paid sick leave, retirement benefits, limits on working hours, safer environments, and discrimination-free workplaces.
Public opinion reflects these perceived benefits. At least half of Americans believe that labor unions increase workers' wages (67%), job security (63%), negotiation power (63%), and job satisfaction (51%).
Potential Benefits for the Economy
Proponents argue unions can contribute to broader economic growth and resilience:
•Reduced inequality and resilience: In addition to supporting the middle class, unions contribute to economic growth and resilience in part simply by reducing overall inequality, which otherwise impedes growth if disadvantaged people cannot acquire skills or start businesses.
•Productivity through voice: Unions can boost businesses' productivity by improving working environments and by giving experienced workers more of an input into decisions that design better and more cost-effective workplace procedures. This is often called the "voice" channel, where unions change how processes are done, which could theoretically either increase or reduce total economic profits by raising or lowering firm productivity.
Costs and Tradeoffs for Workers and the Economy
Other economic research emphasizes costs associated with unions, particularly when unions operate as exclusive bargaining monopolies:
•Labor cartel model: Economic theory suggests that unions raise the wages of their members at the cost of lower profits and fewer jobs, that lower profits cause businesses to invest less, and that unions have a smaller effect in competitive markets (where a union cannot obtain a monopoly). In this view, unions benefit their members but hurt consumers generally, and especially workers who are denied job opportunities.
•Employment and investment effects: A review of 147 studies finds that although US unions have historically secured short-run pay gains, these victories often come at the expense of slower employment growth, fewer future job opportunities, reduced investment and productivity, and diminished firm growth and viability.
•Specific mechanisms: Companies facing excessive union demands often cut investments—particularly in R&D and long-term capital—reducing productivity and profitability, which weakens businesses over time, increasing the likelihood of downsizing or closure. Economists consistently find that unions decrease the number of jobs available in the economy, and the vast majority of manufacturing jobs lost over the past three decades have been among union members--non-union manufacturing employment has risen.
•Flexibility and competitiveness: Unionized employers must negotiate over changes in pay, performance, promotions and working conditions, which can make businesses less flexible and less competitive. Union contracts typically base pay and promotions on seniority rather than individual performance, which can compress wages and make it harder to attract and retain top employees. Surveys find about half of Americans say unions increase the frequency of strikes (48%) or the cost of goods and services (47%).
Recent research also suggests the historical wage premium has narrowed:
•Labor unions have historically secured higher wages for unionized workers. However, recent studies show that since the 1980s, the wage gap between unionized and non-unionized workers has narrowed, in large part because of global competition and technological changes.
What Determines Whether Effects Are Positive?
Research distinguishes between types of union structure:
•Powerful vs. moderate unions: Research shows that while powerful unions with monopolistic characteristics can achieve significant gains at the bargaining table, these victories often come with trade-offs that can negatively impact unionized workers and the economy.
•Structure matters: Yet downstream job losses and firm decline can be traced not to the collective voice itself but to the statutory monopoly structures that amplify aggressive bargaining tactics and block alternative channels for cooperation. Systems permitting multiple forms of representation, voluntary unions, and flexible agreements retain benefits of worker voice without high costs linked to monopolies.
•Mixed evidence on inequality: Some evidence suggests declining union power has contributed to income inequality, but most economists attribute rising inequality primarily to skill-based technological change. The review found the effect of labor union power on income inequality is, at best, mixed.
In summary, for individual members unions are generally associated with higher wages, better benefits, greater job security and improved workplace standards, with spillover benefits to non-union workers in the same industries. For the broader economy, these gains may be accompanied by tradeoffs including reduced profits, lower investment, slower job growth, higher consumer prices, and reduced flexibility, particularly in competitive markets and when bargaining is adversarial. Moderate, cooperative models are found to better preserve benefits while minimizing costs compared to more monopolistic, adversarial models.