To paraphrase my good associate Mr. Wigbomb, the larger squadrons were and are not created to meet a certain cap and requirement, they were formed to be a brotherhood of good friends, in the game, on the forum, but also in real life. Many of the most veteran Dogfight members have met in person, and are not in this game for squad "dominance". Players are chosen- handpicked, if you will- to bring an.element of personality, not another random elite pilot. You will find that the majority of players selected mainly based on level or playing time don't last long.
So, no, there is no reason for the squads to break up. MOM is not McDonalds (no matter how many times I've been personally accidentally associated with that despicable and disgusting corporation): they (or we, I'm new though, so I'm slightly reluctant to say that like I'm a super-important member) are the friendly neighborhood burger shop that gets business because everyone knows and loves the staff.