Several years ago I read a white paper on that perceived problem. In it they noted it would happen, but considered it a non-concern as it would be a nominal issue.
For the elites the black market is always a “minor issue” because the numbers do not exist.
That is one of the major flaws of “experts” who rely on “data”.
They can only see what is reportable and quantifiable.
That in turn can lead to some super dumb and super dangerous decision-making.