What would a sixth foul do?

Some are advocating going from five to six fouls per player. This would have the benefit of allowing your star players to stay on the court longer, which might encourage attendance, since people come to see the stars, and this is all about money, after all. However, a negative affect it might have is to aggravate the already high transfer rate. If players six through nine are getting to play less because players one through five are staying in the game longer because they have an extra foul, players six through nine are more likely (maybe) to look someplace else for more playing time. Just a thought.