Of course the did. How else could the latest KGB director control them.
It was an integral part of a bigwig [nomenclaturist] career - official or inofficial attachment to, and collaboration with, KGB. Like the prior military service used to be expected from United States politicians in the 19th and early 20th century. And it is not a question of "control" - nobody needed to pull any strings. They did not need to be controlled - kegebunery became their very nature, flesh and bones. They instinctively behaved as needed and expected - that's how they got to where they were.