This is just an idea that would add a bit of challenge and realism to the game. What if each worker that you had out consumed 1 unit of food and water at the same interval as colonists, and the crawler workers(ore and gold bugs) would take 3 units of food and water at each interval. It would especially make reptilians a lot harder because at the start you have no food or water.
that logique ,realistique and i love it