In other words, while progressive Democrats are mainly arguing for greater social justice, they can also make a much better case than conservatives ever could that their proposals would help the economy and at least partly pay for themselves.

Last but not least, if your view is that the progressive agenda is morally wrong, that people shouldn’t receive more in government benefits than they pay in taxes, you should be aware how many Americans are already “takers,” “moochers,” whatever. In fact, we’re talking about a vast swath of the heartland that includes just about every state that voted for Donald Trump.

I’ve been reading a recent Rockefeller Institute report on states’ federal “balance of payments” — the difference for each state between what the federal government spends in that state and what it gets back in revenue.

The pattern is familiar: Richer states subsidize poorer states. And the reasons are clear: Rich states pay much more per person in federal taxes, while actually getting a bit less in federal spending, because Medicaid and other “means-tested” programs go disproportionately to those with low incomes. But the magnitudes are startling.

Take the case of Kentucky. In 2017, the state received $40 billion more from the federal government than it paid in taxes. That’s about one-fifth of the state’s G.D.P.; if Kentucky were a country, we’d say that it was receiving foreign aid on an almost inconceivable scale.

This aid, in turn, supports a lot of jobs. It’s fair to say that far more Kentuckians work in hospitals kept afloat by Medicare and Medicaid, in retail establishments kept going by Social Security and food stamps, than in all traditional occupations like mining and even agriculture combined.

So if you really believe that Americans with higher incomes shouldn’t pay for benefits provided to those with lower incomes, you should be calling on “donor” states like New Jersey and New York to cut off places like Kentucky and let their economies collapse. And if that’s what you mean, you should let Mitch McConnell’s constituents know about it.

The point is that while you can criticize particular Democratic proposals, you can only portray progressives as radical or irresponsible, especially as compared with the modern G.O.P., by ignoring or suppressing a lot of facts. I guess facts really do have a liberal bias.

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