I never offered to repeat USSR economy model, it already proven to fail. But with current level of technology it is possible to enable state-wide computer-aided planning system (like ERP, but in much larger scale) which will readjust plan in realtime - so no more shortages, no waste of resources, reduced possibility to embezzle. In Chile there was an attempt to build this system (
Project Cybersyn) but Pinochet's coup didn't let to try.
And this "supercomputer", how will it account for people's wants and desires? People aren't parts in a machine, intended to be used to further some arbitrary ends, they are sovereign beings capable of making decisions and fulfilling their own wants. No centralized system can account for me deciding I want a ham sandwich instead of turkey sandwich. When it comes to the interaction of closed systems (i.e. individuals), past results are not a valid predictor of future encounters.
Something tells me your part of the nuttery-coven at the Venus Project. Good luck with taking resources from people and turning it all over to machines, PM me with the death toll yu have to ring up to make that happen.
Of course planning agency will set wage structures (with participation of the worker unions).
OK, so.....welfare then? Or maybe a better term would be slave/forced labor. When people are denied the basic right of determining how they will work and for what gains, they call that slavery.
There were many countries in Africa who cooperated with USSR, e.g. Ethiopia, Angola, Somalia (the last is totally collapsed now). In some sense it is difficult to prove something using official statistics because pro-market reforms were made by IMF and World Bank fanatics and they teached local officials how to hide real problems and show better economy (which is not true in fact).
TL/DR version: "I like to spout facts and when someone asks me to support them, well.....its a conspiracy!"
BTW, Somalia now is much more "laissez-faire" than United States, I am not joking (no stable govt = no regulations at all)!
A laissez-faire system assumes protection from theft. It is the role of government to provide this protection. The system you were looking for was Anarchy.