Workers are actually pretty expensive, more than $20 dollars per hour plus benefits. Then there is the risk of injury which is quite common in construction and mining. The workers in india wouldn't have those problems. To them it would like a video game (no injuries) and their pay would less than $1 per hour, no benefits.
We already have pilots flying drones in afghanistan from nevadda in real time.
The costs of this equipment are not much compared to the labor costs, so outsourcing is viable.