Infrastructure spending has a higher bang for the buck than just about any other kind of spending. The San Francisco Fed, for one, estimates that every $1 of highway spending raises GDP by $2. Second, even if you don't believe in multipliers, infrastructure spending is something we have to do eventually—so we'd save money if we do it when interest rates are low. Third, investors are paying us 0.43 percent after inflation to borrow for 5 years.
Now look at the above, via Cardiff Garcia, of inflation-adjusted infrastructure spending in the U.S. the past decade. Weeping is optional.See rest here