Infrastructure spending in the US is backlogged for decades. Hard to argue we're overspending on that when we see a major bridge collapse disaster every 5 years.

Bring that schedule forward through issuing more debt at record-low interest rates, and bang, you've solved several problems at once. People have jobs, they spend money, that helps the economy, and we get the infrastructure out of it as well.

You'll even get some of that inflation that's been missing during the QE period, while all the fed economists looked at their macro textbooks in utter confusion.