Spend Now! It'll Save Us Money.
Fiscal prudence, I argue in Bloomberg, would have us borrow for and build almost every infrastructure project on our "to-do" list right now. (As a reminder, I am a big fan of making an independent-agency "infrastructure bank" which would make that list and budget all expenses, taking it largely out of the democratic process except for the decision of how much to allocate to infrastructure spending in aggregate.)
Here's something completely wrong in the argument that the U.S. government can't afford to keep spending: Spending now will actually save the taxpayer a whole lot of money.
The logic is simple. Our government has a big list of projects that are deferrable but inevitable. Bridges must be repaired. Airports must be renovated. Electric grids require maintenance. Few of these are urgent. All of them, however, must receive funding sooner or later. And it's cheaper to do that now, with negative inflation-adjusted interest rates on federal debt and idle resources in construction, than it is later.
Deficit hawks arguing against infrastructure spending are making an error straight out of Economics 101. They're confusing accounting cost with opportunity cost.