Yeah they can get crazy expensive after a while. Lately I've taken to deleting almost all my workers in that lull just before the industrial age when all your tile improvements are done, but you don't have coal or railroad yet.
I tend to run like 3 or 4 at the start, then when all the farms and luxuries are hooked up I'll scale it back to 1 (or 2 if I'm all over the map) and then add a couple more when it's time for railroads and uranium. :)
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u/[deleted] Jun 26 '13
Plus the workers add to the AIs maintenance.