These Democrats are doing this even though it’s political suicide. Class-war progressivism always loses to culture-war conservatism because swing voters in the Midwest care more about their values — guns, patriotism, ending abortion, masculinity, whatever — than they do about proletarian class consciousness.

Democrats are doing this even though the Sanders class-war story is wrong.

Sanders starts with a truth: Workers need more bargaining power as they negotiate wages with their employers. But then he blows this up into an all-explaining ideology: Capitalism is a system of exploitation in which capitalist power completely dominates worker power. This ideology crashes against the facts.

In the first place, over the past few years wages for workers toward the bottom of the income stream have been rising faster than wages for those toward the top. If the bosses have the workers by the throat, how can this be happening?

Second, wages are still generally determined by skills and productivity. For example, Edward Lazear of Stanford University finds that between 1989 and 2017, productivity in mostly high-skill industries rose by roughly 34 percent and wages in those industries rose by 26 percent. Productivity in industries with mostly less-skilled workers rose by 20 percent while wages grew by 24 percent.

As Michael Strain of the American Enterprise Institute puts it, capitalism is doing what it’s supposed to do. It’s rewarding productivity with pay, and some people and companies are more productive. If you improve worker bargaining power, that may help a bit, but over the long run people can’t earn what they don’t produce.