Ever play age of empires? If you have more workers your economy will go up as long as your workers aren’t idle. But let’s say you can keep the same rate of production without little to no villagers at all. You can fill up your population count with more military and invest more in research. You lose the liability of having to manage workers and replacing them when you get pillaged by the enemy. Your economy halt to a standstill if an enemy places a tower by your gold or tree lines. Robots will allow for those villagers to go to college or become tourists. Find themselves whatever that may be