There's no shortage of potential labour, it's the *ARMY* FFS. There are thousands of soldiers that can be ordered to complete a task & will have it done as fast as Humanly possible. No union organizers trying to throw a spanner in the works, no H&S Jobsworth whinging that the concrete needs replacing because it's half-a-shade off from spec, no striking workforce, no extra long fag breaks, it's a captive, regimented, orderly, focused like a laser, group of people that will absolutely get the job done.
And that's just regular Army, not even the _Army_Core_Of_Engineers_ that !LIKE! to do such tasks & have metric fucktonnes of heavy construction equipment with which to do it.
You want to try the tech, fine, but don't site a ficticious *labour savings* as the reason why. You're a fekkin' ant's nest of drones that can be put to work to Get Shit Done Right The Fuck Now.
I'm an *AirForce* MilBrat and even *I* know that much about the grunty ground pounders, jarheads, & leathernecks. Give them credit where it's due & don't insult their (admittedly limited) intelligence by saying you need to save labour.
*Notices the approaching angry mob of ground pounders, laughs, waves, & runs like hell*