Unemployment may have advantages as well as disadvantages for the overall economy. Notably, it may help avert runaway inflation, which negatively affects almost everyone in the affected economy and has serious long-term economic costs. However the historic assumption that full local employment must lead directly to local inflation has been attenuated, as recently expanded international trade has shown itself able to continue to supply low-priced goods even as local employment rates rise closer to full employment.

The inflation-fighting benefits to the entire economy arising from a presumed optimum level of unemployment has been studied extensively. Before current levels of world trade were developed, unemployment was demonstrated to reduce inflation, following the Phillips curve, or to decelerate inflation, following the NAIRU/natural rate of unemployment theory.

Beyond the benefits of controlled inflation, frictional unemployment provides employers a larger applicant pool from which to select employees better suited to the available jobs. The unemployment needed for this purpose may be very small, however, since it is relatively easy to seek a new job without losing one's current one. And when more jobs are available for fewer workers (lower unemployment), it may allow workers to find the jobs that better fit their tastes, talents, and needs.

As in the Marxian theory of unemployment, special interests may also benefit: some employers may expect that employees with no fear of losing their jobs will not work as hard, or will demand increased wages and benefit. According to this theory, unemployment may promote general labor productivity and profitability by increasing employers' monopsony-like power (and profits).

Optimal unemployment has also been defended as an environmental tool to brake the constantly accelerated growth of the GDP to maintain levels sustainable in the context of resource constraints and environmental impacts. However the tool of denying jobs to willing workers seems a blunt instrument for conserving resources and the environment -- it reduces the consumption of the unemployed across the board, and only in the short-term. Full employment of the unemployed workforce, all focused toward the goal of developing more environmentally efficient methods for production and consumption might provide a more significant and lasting cumulative environmental benefit and reduced resource consumption. If so the future economy and workforce would benefit from the resultant structural increases in the sustainable level of GDP growth.