[astazangasta]

No. Plato wanted to present an idealised world ruled by philosophers like himself. He wanted to deny that this world was equivalent to the highly unpopular government that had been imposed on Athens by their nemesis Sparta. That is, he wished to deny that Critias, despite being educated in the manner Plato favored, was a true representative of that philosophy, since the result was so unpopular. This is a position taken by many ideologues, Marxist, capitalist or otherwise, who repudiate the failures of their system in practice - the system fails because it is not "real" Marxism, etc., which can remain forever perfect in theory. In reality it isn't difficult to see the outcome of Plato's philosophy (I am thinking mostly of The Republic) as playing out in real life exactly as the Thirty Tyrants did - a bunch of rich brats raised to think they were wise philosophers visiting their "wisdom" on a captive populace.