Plato said that there is no true measure of justice, but it is important for a government to give the appearance of justice to society. This is a textbook example of that in action.
Don't just make up quotes and attribute them to Plato. It makes philosophers really angry.
"I really said that" - Plato
"This generation may be the one that will face Armageddon." -- Ronald Reagan, "People" magazine, December 26, 1985