I think I posted this in the old forum and cannot find it here, so here it is again.
My workers currently spend their time sitting around doing nothing. Personally I think they guzzling beer, but even if they doing what Minions do and having cute little drinks with umbrellas, they are still doing NOTHING.
So I suggest an actual gem spending idea in the game. Another player, probably a team member can request to borrow a worker from someone else for a week at the cost of a gem or two. The owner does not get the gem, but they do get some compensation say either gold or food. SP gets the gem and at the end of the time the worker goes back to their owner.
I think that a person borrowing workers should be allowed to go up to a total of 6 workers, no matter what their current number of worker huts is.