If you don't want the hassle of managing workers, why don't you automate them? If you don't want them to change anything there is an order you can give them to do just that. Any unworked land will be turned into something by a worker who is set to Automate/no altering. If all your workers on a quiet land mass are automated then you can forget about them......they will clean up pollution, build roads, railroads, mines etc without you having to do anything. It leaves you free to conduct your war. The next time you remember to look at that land mass it'll be a veritable garden of eden......erm....with railroads in it! The great thing about this is that when they've improved every available tile on the map, they'll just wait in a city until they're needed, and then pop out automatically....such as when pollution occurs. Or, if you've captured a border town, they'll immediately come out and start to work the captured land, build roads etc. Gawd bless 'em! That's what I say.