There is a similar thing in football now with the same few teams dominating the top leagues nearly every season, probably as a reusult of the Champions League money helping them gain an edge over the rest of their domestic league competitors. (Bayern Munich in Germany, Real Madrid & Barca in...
I doubt if Bernie would be too disappointed if the smaller teams disappeared because it could lead to the remaining teams having more drivers competing (3 drivers/cars per team) and then you may have a more competitive sport as a result (especially if 2 teams are fairly equally matched or no...