[aopinthesky]

>>>adding a new house means disbanding another house (and in many cases it does when a particular house is low in numbers and is not making quota), then the 4% population will not grow<<<

Forgive me if this posts twice, I had a problem the first time, I think. But I have seen this happen firsthand. Someone decides that a new NPC sorority is just the ticket for boosting greek life and they convice those in charge, despite the fact that at least one group is struggling to achieve quota every year. The new group comes to campus and does very well because a lot of people are interested in the new kid on the block and there are no preconceived reputations. Predictably, this pushes the struggling group out. The greeks at the campus that is resisting this effort probably realize very well that if a struggling GLO gets pushed out due to a new group coming in, there WILL be a group to take that last place. They are doing the right thing in trying to take care of what they have.
I agree that growth is healthy, but expanding the greek base may not be the best alternative, and the fact that the existing GLO's are resisting that expansion may not mean that they are against growth.