Since 1979 through 2016, outlays at all levels have doubled on average every 12.3 years, similar to the period 1898 through 1932 when they doubled on average every 11.3 years.
Outlays in the US in between those periods, from 1932 to 1979, at all levels doubled every 7.8 years on average.
The slowdown in outlay doubling times from the end of the Carter administration is no doubt connected to increased Republican governance, but outlays now divert from productive purposes 4.6 times what they did in 1898, the highest ever except for WWII but still higher than during WWI.
Why? Are we at war today?