What will they actually optimize for is an excellent question. We have plenty of central planning, its just most people don't like it very much. Look at the i

What will they actually optimize for is an excellent question. We have plenty of central planning, its just most people don't like it very much. Look at the intentional destruction and elimination of the american middle class or the general population of Greece or how the criminal justice system treats black people in the USA. Statistically, they're unlikely to optimize for you, for most values of you. Also don't forget the somewhat more intractable philosophical problem of whats actually good for you vs what you superficially want vs what you actually want, and our recent history of spending trillions on PR to intentionally confuse people about those three. I think we can safely assume that it'll be very cheap and easy to keep almost everyone unhappy about "the" central plan, which will be weaponized by factions. Looking at how the disease of Puritanism has infected most of our culture pretty deeply, you can expect a similar meme infection in a centrally planned economy. So even assuming there is a "True" ideal state, we'll have infections and need an immune system. Merely computing faster or more complicated models is like assuming yeast are diseased and whales are disease free merely because of size and complication differential. What we do know from biology is the more mono-cultural and rigid something is, the more likely it is to get wiped out, and the analogy to central planning would be it'll inevitably get wiped out by meme diseases, so the best long term central plan might ironically be to not centrally plan.