Not yet they aren't. Venona uncovered 349 Americans who maintained clandestine contact with Soviet intelligence. When McCarthy held the hearings, we only knew the identities of around 150 of them. And many of those were in very high positions. What was driving McCarthy nuts is where the other 200 were. We never found most of them. More than a few are no doubt alive today. Living on fat government pensions no doubt.
Another thing bugged McCarthy and others. Obviously, Venona did not expose everyone. How many more were there? And where? In 1945, America was the world's only super power. The Soviets were victorious but badly mauled. 6 years later , communists had taken half of Europe, all of China half of Korea and had the atomic bomb. Something was wrong with our government. Very, very wrong.