The Governing Body and many important-feeling upper level Watchtower men, just like all the full-time servants, were lower middle level pioneers or others who slaved for not much personal gain (if any).
So they worked their way to the top. They had a choice to accept the green handshakes, first class travel, hotels, restaurants while traveling, a slightly better apartment while not traveling- which is changed now that they have built new quarters that include more of the higher end luxuries than Brooklyn had.
But in all the history, the same people of power who accept SOME benefits, because it was a huge step up from slaving, have steered money to JW businesses. There were paper, ink, technology, furniture, construction corporations. There were plenty of lawyers and accountants and realtors.
So the trade off for the people getting money was that they had to kiss the asses of the Governing Body and/or others that steer the money toward them.