UBI hotly contested.

The concept might sound far-fetched, but a so-called universal basic income (UBI), is currently one of the most hotly debated policy topics being floated as a means to address income inequality and the disruption that technology poses to the workforce. UBI is being tested in Finland and other international markets, but has received decidedly mixed reactions.

Meanwhile, developments in robotics and artificial intelligence have grave implications for the labor force. A report issued this week from consulting firm PwC found that more than a third of U.S. jobs were at risk from automation, upping the ante for policy makers to cushion the blow to workers.

Advocates for UBI argue that a guaranteed paycheck could serve as a way to fight poverty and uncertainty in an evolving U.S. economy, and encourage workers to take more risks in the job market if they had some extra money as a cushion.

The idea has gained prominent backers such as Tesla CEO Elon Musk, who recently told CNBC he supported UBI — joining a growing list of tech execs who’ve voiced support for the concept as a solution to unemployment that will be caused by future automation — the rise of the robots. Silicon Valley’s Y Combinator President Sam Altman and eBay Founder Pierre Omidyar have also expressed support for a universal income.

Skeptics, however, insist that a guaranteed paycheck would actually reduce the incentive to work. In their view, a UBI would accomplish little other than wasting money on those who don’t need it, and may even crowd out programs like Social Security and Medicare.

The increasingly polarizing concept was on full display this week, as UBI backers and antagonists sparred at a debate hosted by Intelligence Squared U.S. in New York City.

The debate made for strange bedfellows, as a well-known labor organizer teamed up with an economic libertarian to argue in favor of UBI, while two aides to former president Barack Obama and vice president Joe Biden pushed back on the idea.

“Despite job growth, the November election is a shocking warning that the economy is off to a bad start, and many people are stuck in minimum wage jobs,” said Andrew Stern, the former president of the Service Employees International Union, one of the largest and most organized labor unions in the country.

With a turbulent economy giving rise to populism, Stern said the economic environment was creating a “U.S. of anxiety” over money. A universal income would be “humane, flexible, it promotes choice and freedom, and offers security to individuals,” Stern added.

Well-known libertarian Charles Murray agreed, saying that by the government eliminating spending on some programs, thereby generating revenue to spend elsewhere, “we can afford to do this in America.” However, Jason Furman, a former chairman of the Council of Economic Advisers under Obama, rejected the suggestion, saying it would do more harm than good.

“If you give someone a dollar, [that dollar] has to come from somewhere,” said Furman, arguing that a universal income would actually take America in the wrong direction and worsen economic conditions.

UBI boosters “argue that [government] money sent to the elderly today doesn’t work … that the welfare state today doesn’t work, but these claims are false,” Jared Bernstein, a former economic adviser to Biden, told the debate’s participants.

Myriad welfare programs currently employed by the government “lift more than 40 percent of Americans out of poverty, and instituting a universal income in our country would undermine that progress,” he said.