It doesn't depend on the faction, producing more bases doesn't depend on having more scvs, drones or probes. It depends entirely on what your opponent is doing and how you are countering it. Idle games are the worst analogy. Even rock-paper-scissors comes closer.
> It doesn't depend on the faction, producing more bases doesn't depend on having more scvs, drones or probes.
In SC2 it does for Zerg: their units are weaker than other races so in order to compensate that you have to reinforce faster which is done by having more hatcheries to mine more and produce extra larva.
In BW the only thing that pushes additional bases is using gas-heavy strategies since there's only 1 geyser per base with limited rate of gathering.
Within a game, the "derivatives" start looping on themselves to keep the game balanced and interesting.