Let’s turn next to Social Security. There were rumors beforehand that the commission would recommend a rise in the retirement age, and sure enough, that’s what Mr. Bowles and Mr. Simpson do. They want the age at which Social Security becomes available to rise along with average life expectancy. Is that reasonable?

The answer is no, for a number of reasons  including the point that working until you’re 69, which may sound doable for people with desk jobs, is a lot harder for the many Americans who still do physical labor.

But beyond that, the proposal seemingly ignores a crucial point: while average life expectancy is indeed rising, it’s doing so mainly for high earners, precisely the people who need Social Security least. Life expectancy in the bottom half of the income distribution has barely inched up over the past three decades. So the Bowles-Simpson proposal is basically saying that janitors should be forced to work longer because these days corporate lawyers live to a ripe old age.

Still, can’t we say that for all its flaws, the Bowles-Simpson proposal is a serious effort to tackle the nation’s long-run fiscal problem? No, we can’t.

It’s true that the PowerPoint contains nice-looking charts showing deficits falling and debt levels stabilizing. But it becomes clear, once you spend a little time trying to figure out what’s going on, that the main driver of those pretty charts is the assumption that the rate of growth in health-care costs will slow dramatically. And how is this to be achieved? By “establishing a process to regularly evaluate cost growth” and taking “additional steps as needed.” What does that mean? I have no idea.

It’s no mystery what has happened on the deficit commission: as so often happens in modern Washington, a process meant to deal with real problems has been hijacked on behalf of an ideological agenda. Under the guise of facing our fiscal problems, Mr. Bowles and Mr. Simpson are trying to smuggle in the same old, same old  tax cuts for the rich and erosion of the social safety net.

Can anything be salvaged from this wreck? I doubt it. The deficit commission should be told to fold its tents and go away.