Related: when Marxism was actually implemented, they had big problems with not building the right things, and building the things they did build poorly. For example a factory was assigned the task of building N pounds of nails a day, so they just built one giant nail that weighed N pounds (and was totally useless) rather than buliding what was needed. Because it turns out, management is actually needed and useful.
[And so are price signals, but let's take baby steps here!]