Job insecurity is a central theme of the 2016 campaign, fueling popular anger about trade deals and immigration. But economists warn that much bigger job losses are ahead in the United States — driven not by foreign competition but by advancing technology.

A look at the numbers suggests that the country is having the wrong economic debate this year. Employment security won’t come from renegotiating trade deals, as Donald Trump said in a speech Monday in Detroit, or rebuilding infrastructure, as Hillary Clinton argued in Warren, Mich., on Thursday. These are palliatives.

The deeper problem facing the United States is how to provide meaningful work and good wages for the tens of millions of truck drivers, accountants, factory workers and office clerks whose jobs will disappear in coming years because of robots, driverless vehicles and “machine learning” systems.

The political debate needs to engage the taboo topic of guaranteeing economic security to families — through a universal basic income, or a greatly expanded earned-income tax credit, or a 1930s-style plan for public-works employment. Ranting about bad trade deals won’t begin to address the problem.