What is revealed about napoleon and his administration when it is learned that the 7 commandments had been altered?

When the commandments are once again altered, it is revealed that though the commandments stand.... the exception to all rules is the pigs.

But a few days later Muriel, reading over the Seven Commandments to herself, noticed that there was yet another of them which the animals had remembered wrong. They had thought the Fifth Commandment was "No animal shall drink alcohol," but there were two words that they had forgotten. Actually the Commandment read: "No animal shall drink alcohol to excess."