I dunno, I think Dwarf Fortress puts an interesting spin on this, in that individual dwarves have personalities, desires, moods, etc, and you don't control anything directly, only by sending orders. There is a need to optimize the efficiency of the system of the fort, but it is in the service of a larger overarching goal (once out of the survival stage). The end goal is completely arbitrary, and I would even say "artistic" in meaning. It makes no "economic" sense, it is only done in pursuit of fulfillment and meaning.
The problem with a "capitalist/liberal strategy game" is not that it would interfere with player agency, but that it would lack that kind of "goal" or "meaning". The hierarchy of the system would be flat, where each individual unit strives to fulfill their own needs, resulting in efficiency, but to what end would the whole system exist, beyond perpetual expansion/survival? I think funnily enough this mirrors the erosion of a feeling of zeitgeist under capitalism, where it seems like there is no "meaning" or ideological purpose to the system. When was the last time humanity united towards some kind of arbitrary, idealistic goal? The space race?
It's also interesting to think that a few of the top richest people in the world are now playing dwarf fortress IRL, in that they have accumulated enough wealth to try and fulfill some kind of arbitrary megaproject that can only be done if centrally managed by a powerful individual. Some send automobiles to space, others try to create a simulated virtual reality dystopia.