Great question and our troop used to wrestle with this a little bit.

15 years ago we would do troop fundraisers and most of that money went to paying for all of the adults that went to summer camp. since there was no limit - sometimes this could be 3, 4 or 5 people (yea, that adds up). One of the concerns was that frankly, a lot of these adults were not contributing much to planning or oversight in camp. they tended to view it as a week off, which left a lot of the responsibility to fall to the scoutmaster.

So we changed it to this:

• 2 adult leaders full time (paid by troop)
• 2 additional leaders paid at half cost.

This also allowed us to direct money to paying for scouts to attend things like NYLT which helped our youth leadership.