I'm not certain of the balance myself. I was thinking as a counterpoint of the band The Beatles where the two song writers (McCartney and Lennon) are seen in competition. There is a balance there between their competitiveness as song writers and their cooperation in the band.

I think it is one-sided to see any situation where we want to retain balance as being significantly affected by one of the sides exclusively. If one believes that there is a balance to be maintained between cooperation and competition, I don't immediately default to believing that any perceived imbalance is due to one and not the other.