I *do* want people fed and housed “efficiently” in the sense that long-term I want the most people fed and housed comfortably, which means achieving that comfort by the expenditure of the least resources per person. For example, making/keeping people poor is inefficient as it makes them spend more (it’s expensive to be poor, as per Vimes). So an “efficient” system needs to be against poverty. I agree that perfect is the enemy of good, but efficient *is* better with the right definition of value.