Agreed: Planescape's faction represents ideologies, philosophies and world (... multiverse?)view and societal view that's political by nature. Their label are just not a 1:1 match with our world.

And in Disco Elysium (in least in my playthrough and my impression) everyone gets criticized equally at some point, even though the writers are nostalgic communist. But it doesn't feel to me like blatant propaganda.