Senators Rob Portman and Kyrsten Sinema answer questions from members of the press during a news conference on Capitol Hill, July 28.

Photo: Alex Wong/Getty Images

One claim about the Senate’s infrastructure bill is that it would be, as the authors said, “fully paid for.” The Congressional Budget Office rudely blew apart that myth on Thursday, not that the authors seem to care.

CBO’s budget gnomes found that the $1 trillion spending bill will add $256 billion to the federal deficit over 10 years. But it’s worse than that. CBO also explained that the bill will increase the government’s contract authority by an additional $196 billion over the 2021 budget baseline. The estimate is complex, but the Committee for a Responsible Federal Budget calculates the mix of costs and savings will result in nearly $400 billion in deficit spending over a decade.

A couple of examples highlight the fiscal flim-flam. The bipartisan group of Senators tried to claim as “savings” some $53 billion in unemployment benefits that states won’t spend as anticipated. But CBO notes that the “lower outlays” had already been counted in its baseline and so don’t now amount to a “reduction in spending.”

CBO also didn’t credit $106 billion in supposedly unused Covid paid- and family-leave tax credits, and only a portion of what Senators claimed were $67 billion in savings from a Covid employer tax credit. Of the $210 billion of “unused” Covid funds Senators ultimately claimed they were “repurposing,” CBO gave them credit for about $21 billion.

CBO also didn’t buy the claim that spending in the bill will yield a magical return of 33% on investment, producing faster economic growth and additional tax revenue of $53 billion. Some infrastructure spending on particular projects might improve economic productivity. But $66 billion more for Amtrak and related rail projects? You’ve got to be kidding.

In a better age, the CBO numbers would have been big news and sent the Senators back for a rewrite. But in 2021, when deficits don’t matter because they’re monetized by the Federal Reserve, the report barely caused a ripple of media attention, never mind concern.

Senators Rob Portman and Kyrsten Sinema, the leaders of the bipartisan gang, counseled their colleagues in a press release to ignore the CBO and assume that the budget estimates that the Senators had offered are accurate.

We get it, Senators. You really want to spend this money. You want the media huzzahs that you did something “bipartisan,” and that you can show that “Washington works,” at least in throwing money around.

But then at least be honest about it. Drop the pretense of fiscal conservatism and the transparently false claim that this is paid for. At least you didn’t raise taxes in this bill, though those are coming soon enough.

Potomac Watch: Despite what progressives like Alexandria Ocasio-Cortez may think, climate legislation is not infrastructure legislation. Images: Getty Images Composite: Mark Kelly The Wall Street Journal Interactive Edition