Four years ago, some of us watched with a mixture of incredulity and horror as elite discussion of economic policy went completely off the rails. Over the course of just a few months, influential people all over the Western world convinced themselves and each other that budget deficits were an existential threat, trumping any and all concern about mass unemployment. The result was a turn to fiscal austerity that deepened and prolonged the economic crisis, inflicting immense suffering.

And now it’s happening again. Suddenly, it seems as if all the serious people are telling each other that despite high unemployment there’s hardly any “slack” in labor markets — as evidenced by a supposed surge in wages — and that the Federal Reserve needs to start raising interest rates very soon to head off the danger of inflation.

To be fair, those making the case for monetary tightening are more thoughtful and less overtly political than the archons of austerity who drove the last wrong turn in policy. But the advice they’re giving could be just as destructive.

O.K., where is this coming from?

The starting point for this turn in elite opinion is the assertion that wages, after stagnating for years, have started to rise rapidly. And it’s true that one popular measure of wages has indeed picked up, with an especially large bump last month.