Just checked both of those out. Eco looks like it might be what I was looking for! Watched a video where a guy joined a server of "red team" and "blue team", and the reds/socialists way out produced the blues. I think the multiplayer aspect is what intrigues me, as long as it doesn't allow wreckers to ruin everything.
RimWorld also looks interesting, the randomness mechanic I think is really good for a single player game.
This is basically Ex Machina played in reverse