Barca's preparations for Sunday's trip to Real Madrid have been marred by Yamal's swipe this week.
Yamal, during an interview for the King's League, declared Real Madrid "always steal" when joking on stream.
The comments have sparked fury from Real fans and watching from France, Vairelles said on Jerome Rothen's podcast: "Does it shock me or displease me? Of course it displeases me, you have to move with the times...
"But what shocks me the most is that the club lets him do this, you have the impression that no one intervenes anymore, he is still paid handsomely by the club. If I were the coach or an important leader of this club, I would prevent him from doing this kind of thing, or I would fine him.
"Today, you have the impression that anything is possible."