May I suggest something?
...people can always pay someone to do something for them like delivery.
I would like to see something like this with vehicles (ex. bikes, cars, trucks). Players get paid to pick up resources/raw materials and deliver them to factories to turn them in to processed goods, or ports (air/sea/boarder). And then the processed goods can be delivered to distributors (stores) and/or consumers, like pizza delivery! Unless your planning something similar.