That's not that much for a team who is winning almost allways...
I have "only" 87k with 8 Belgians on 12 players, 2 Belgian NT players and one Brazilian NT21 player... So it seems that having NT players or Belgians should not influence excessivelly... or should be gather with other (more important) elements like the results of the NT team, the influence of the NT player in the result of the NT team and the local team, the enthousiasm of the supporters,... and so on... and so quite complicated to modify it, as not depending directly of the team manager decisions but more about the global situation.