I don't think it can. Even if you banned lawyers from court rooms, rich people would still hire "legal tutors" to prepare for a court appearance.

It's would be better - far from ideal, but marginally better - to increase the number of lawyers in criminal and family law and ban for-profit private representation. All cases would be heard before a random judge and argued by a random public defender and public prosecutor.

The paradox is you can only have perfect justice with perfect surveillance, because that's the only way to eliminate doubt about matters of fact.