If you can do central planning, money becomes mostly superfluous. The whole point is that factories don't pay for their inputs, stores are stocked without borrowing to buy goods, profitability of individual firms becomes irrelevant, and the overwhelming majority of economic activity is based on supplying planned needs.

You could still have money but needing money to live a normal life or being able to use money to invest or stockpile goods would represent a failure of central planning.