It happened in Soviet Russia.... When the revolution came and the communists changed the whole social structure, the czar was killed, and a strange phenomenon came into existence. The people who had killed the czar turned out to be greater czars than the czars themselves. Josef Stalin proved to be far more terrible than Ivan the Terrible. Ivan is nothing compared to Josef Stalin.
And it is a natural phenomenon. I am not blaming Josef Stalin at all, I can understand what really happened. If you fight with the czar you have to learn his ways, and by the time you are the winner you have learned the ways so skillfully, so efficiently, they have become your ways. You start practicing the same on your enemies. That's why every revolution has failed. Persons change but the structures remain the same, because the idea of "freedom from" is basically wrong.