Just a thought. I assume not all teams claim 5 passes, but I also assume PSI budgets for all the teams to claim 5 passes? If so, teams should be able to auction off their fifth pass to teams who want 6 passes. It will reduce the cost for the 6th parson on one team and increase the fundraising efforts of the team with 5.
For what it's worth, I agree with the comment that the 5th and 6th person generally don't add much to the show. They add to the TEAM (i.e. I feel that my team is more likely to place well if we have a coach to make strategy calls), but as far as the SHOW, my prep work is done months, weeks, days, and hours in advance. By the time I'm on stage, my coach isn't doing shit.