Nope you dont because every single law would be in a civil contract format, no law shall be forced on anyone, based on the anarchist voluntarist principles. The decentralized system would serve as a voluntary voting system, ok there would be some minority always, be we could raise the voting minimum to 75% , not 50%+1.

So a typical court trial would always be a civilian case, never a criminal, thus you dont need prosecution, because everything would be privatized.

For example if you vandalize state property, then the prosecutor will represent the state, but if that property were all private without state property, then the property owner could decide to sue you or not.
In murder cases, the victims family or relatives could decide to let the defendant go or trial him.

Thus all courts could be privatized aswell, because you never need any state body to do it, a private one could always do it more cost efficiently and faster. An average 7-8 year trial would now only be 4-5 months long and would cost a lot less, while it would be just as fair as it is now or even better.

And bureaucrats ? Why do you need those? You can easily replace any bureucrat with a computer AI, because thats all they do, repetitive and organized work, which a computer AI can do just as well or better, and of course will cost less.

You need a bureocrat at the town hall to approve stuff and put stamps? Well replace all the paper documents with electronic documents because why chop off the trees and destroy the enviroment when we live in the 21st century?
And the electronic documents could be arbitrated by a computer AI where the criteria would be coded into it, and it would use bayesian decision making to arbitrate a document.

Its just that easy, we absolutely dont need bureocrats.