Microsoft co-founder Bill Gates believes concerns about mass unemployment caused by artificial intelligence are justified, pointing to a loophole in the current tax system that may encourage companies to replace human workers with machines. In a new post on his personal blog, Gates argued that under existing tax rules, employers using AI-driven machines rather than hiring human employees could actually gain a financial advantage.

The entrepreneur and philanthropist wrote that when an employer hires a worker, they pay payroll taxes on that employee's income, but purchasing a robot can typically be written off as a business expense. "This tax system effectively pushes companies to substitute machines for people," he stated. To address this, Gates has proposed levying taxes on AI computing units and robots, noting that such revenue generation is also essential for governments facing shrinking income tax collections alongside rising costs for retraining and social welfare programs.

"When budgets are tight, the money has to come from somewhere," Gates wrote in the nearly 6,000-word essay, which was published shortly after news broke that U.S. government debt had surpassed $40 trillion. He explained that the tax could modestly slow the pace at which businesses abandon human labor while raising funds for vocational retraining and building stronger social safety nets. He stressed that tax policy must be carefully designed to avoid suppressing clearly beneficial applications of AI, such as reducing costs in medicine and education.

Gates first floated a similar proposal nearly a decade ago and faced sharp criticism at the time. In 2017, former U.S. Treasury Secretary Larry Summers said the idea was "profoundly misguided," adding that a robot tax essentially risks becoming protectionism that hinders technological progress. Robert Seamans, a professor at New York University's Stern School of Business, expressed a similar view that year, acknowledging that the potential spread of robotics and automation requires policymakers to rethink 21st-century fiscal policy along with education and retraining programs, but concluding that based on available data, a robot tax is a poor policy that discourages investment, slows economic growth, and could reduce job creation and wage growth in cases where robots complement human labor.

Gates is aware of these criticisms but maintains that his detractors fail to account for the broader value of work to individuals and society. "As the pace of innovation accelerates, we can afford some loss of efficiency as the price of keeping people employed," he wrote. He added that taxation is not the complete answer to the AI threat, listing three major risks of AI elsewhere in the essay, but described the proposal as part of a "sensible response."

Gates also emphasized that whatever additional support funds are raised should be directed to those who need it most, including workers displaced by AI and robotics, those facing reduced hours or lower pay, and regions where unemployment is concentrated.