Penny-pinching at a time like this isn’t just cruel; it endangers the nation’s future. And it doesn’t even do much to reduce our future debt burden, because stinting on spending now threatens the economic recovery, and with it the hope for rising revenues.

So now is not the time for fiscal austerity. How will we know when that time has come? The answer is that the budget deficit should become a priority when, and only when, the Federal Reserve has regained some traction over the economy, so that it can offset the negative effects of tax increases and spending cuts by reducing interest rates.

Currently, the Fed can’t do that, because the interest rates it can control are near zero, and can’t go any lower. Eventually, however, as unemployment falls  probably when it goes below 7 percent or less  the Fed will want to raise rates to head off possible inflation. At that point we can make a deal: the government starts cutting back, and the Fed holds off on rate hikes so that these cutbacks don’t tip the economy back into a slump.

But the time for such a deal is a long way off  probably two years or more. The responsible thing, then, is to spend now, while planning to save later.

As I said, many politicians seem determined to do the reverse. Many members of Congress, in particular, oppose aid to the long-term unemployed, let alone to hard-pressed state and local governments, on the grounds that we can’t afford it. In so doing, they are undermining spending at a time when we really need it, and endangering the recovery. Yet efforts to control health costs were met with cries of “death panels.”

And some of the most vocal deficit scolds in Congress are working hard to reduce taxes for the handful of lucky Americans who are heirs to multimillion-dollar estates. This would do nothing for the economy now, but it would reduce revenues by billions of dollars a year, permanently.

But some politicians must be sincere about being fiscally responsible. And to them I say, please get your timing right. Yes, we need to fix our long-run budget problems  but not by refusing to help our economy in its hour of need.