It’s not too hard to understand why everyone seeking the Republican presidential nomination is proposing huge tax cuts for the rich. Just follow the money: Candidates in the G.O.P. primary draw the bulk of their financial support from a few dozen extremely wealthy families. Furthermore, decades of indoctrination have made an essentially religious faith in the virtues of high-end tax cuts — a faith impervious to evidence — a central part of Republican identity.

But what we saw in Tuesday’s presidential debate was something relatively new on the policy front: an increasingly unified Republican demand for hard-money policies, even in a depressed economy. Ted Cruz demands a return to the gold standard. Jeb Bush says he isn’t sure about that, but is open to the idea. Marco Rubio wants the Fed to focus solely on price stability, and stop worrying about unemployment. Donald Trump and Ben Carson see a pro-Obama conspiracy behind the Federal Reserve’s low-interest rate policy.

And let’s not forget that Paul Ryan, the new speaker of the House, has spent years berating the Fed for policies that, he insisted, would “debase” the dollar and lead to high inflation. Oh, and he has flirted with Carson/Trump-style conspiracy theories, too, suggesting that the Fed’s efforts since the financial crisis were not about trying to boost the economy but instead aimed at “bailing out fiscal policy,” that is, letting President Obama get away with deficit spending.

As I said, this hard-money orthodoxy is relatively new. Republicans used to base their monetary recommendations on the ideas of Milton Friedman, who opposed Keynesian policies to fight depressions, but only because he thought easy money could do the job better, and who called on Japan to adopt the same strategy of “quantitative easing” that today’s Republicans denounce.