Some of the Left's Ideas Start to Go Mainstream

Some of these proposals amount to extensions or reinforcements of the Obamacare system; some are more ambitious. My personal favorite is Medicare X, proposed by Senators Michael Bennet and Tim Kaine, which would allow any American to buy into a somewhat expanded version of the current Medicare system. That system would leverage Medicare's proven ability to hold down costs, while offering consumers a menu of choices — basically, Cochrane's idea.

Health care isn't the only issue where the Overton Window — or the range of ideas deemed worthy of consideration — has shifted to the left. The idea of a federal job guarantee, once considered a radical proposal, is now a centerpiece of Ocasio-Cortez's platform. And as with health care, center-left leaders are coming up with compromise proposals that move somewhat in the direction of the big new socialist idea.

California Democratic Rep. Ro Khanna has released a plan that would use a combination of government jobs and private-sector employment subsidies to launch a multipronged attack on unemployment and underemployment — not the most urgent of policies with unemployment as low as it is now, but very useful to have in place when the next recession comes. His plan would find jobs for workers who are out of work for 90 days or more, attempting to place them in the private or nonprofit sectors, and provide subsidies to encourage this. It would offer temporary government employment, but only for those who couldn't find jobs elsewhere. The plan also provides funding for cities to experiment with full public job-guarantee programs of the kind Sanders has called for.

Khanna's plan seems like a good one. Private-sector employment subsidies have a track record of success — evidence shows that they boost workers' likelihood of employment years after the policy finishes. The U.S. also had good success with a smaller job subsidy program during the Great Recession. And the idea of experimenting with Sanders-style job guarantees at the local level is a good one, since it would provide more data on whether that sort of program can work in the U.S. Senator Cory Booker has also proposed these kinds of experiments.

It's great that people on the center-left — and even some on the center-right — are advancing sensible proposals like Medicare X and Khanna's jobs plan. These plans would allow the country to move toward a more egalitarian society at a deliberate pace, rather than a breakneck rush. Countries like Denmark that have built successful social democracies have not done it with guillotines and revolution, but with a series of measured reforms. Meanwhile, modern-day countries like Venezuela that have gone in for a more radical approach have often ended up as basket cases. It's obviously better to be Denmark than Venezuela.

Measured reforms allow a country to "cross the river by feeling the stones," as Chinese reformer Deng Xiaoping once put it. Deliberation allows policy makers to find out what works, to get data and feedback, to understand both the drawbacks and the further opportunities their initiatives create, and to experiment with localized approaches. They are, in short, a smart way to improve a country.

Meanwhile, the more dramatic proposals of socialists like Ocasio-Cortez and Sanders have their place in a healthy debate of ideas, although that doesn't mean they should be enacted. Instead, they should serve as guiding compasses for reformers to follow — stylized depictions of egalitarian ideas to be moved toward rather than fully realized.

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Noah Smith is a Bloomberg Opinion columnist. He was an assistant professor of finance at Stony Brook University, and he blogs at Noahpinion.