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
"The fundamental principle of science, the definition almost, is this: the sole test of the validity of any idea is experiment." -- Richard P. Feynman