Long story short, it's recently occurred to me that sometimes the loot that comes up in an AP needs to be scaled up slightly if you have a larger group than the assumed 4 people. It seems obvious but sometimes it just doesn't 'click' right away that you're spreading 4 players' worth of equipment across 5 players until, say, someone has to switch characters for some reason and there's the inevitable comparisons between standard assumed WBL and what the rest of the group has (never mind that the others have bypassed opportunities for monetary gain earlier on and some of them insist on spending gold frivolously and then complain they're broke).
So, other than some of the obvious easy solutions (scale up the amount of coin), does anyone have any good suggestions for ways to adjust AP treasure for a slightly larger group without throwing things off?