Boxing Day & New Years' Tests

Apparently South Africa are lodging a complaint against Australia having a monopoly on the Boxing Day Test and the New Years' Test as they would like to schedule Tests then too. You can view the full article here.

Perhaps I'm being naive (feel free to comment and let me know if I am!), but why can't games go on in South Africa and Australia on these dates? Yes, the TV rights become less expensive as people can't watch two games at once, but if it's that important to South Africa then they'll just have to go head-to-head against Australia and see how they do.

I'm not against positive change, but I can't see what is positive about robbing Australian fans of matches that have become national institutions.