Don't rockets come back to be used for next reclaiming ?
An animation at each level start with a rocket crashing on the map would be fun. After the crash, the initial money would fly from the wreck to the money counter.
I imagined it being solely for the purpose of cleaning up. Not even anthropocentric self-justifying of humanity, perhaps like the entire operation is AI directed and then after the mission is efficiently accomplished, the rockets just steer themselves into the Sun or something, not to leave traces behind. Well but not everything needs explaining.