It's customary to tip a guide. If you want to be THE guide out there explaining why your fee is higher, then feel free.
Trout guides typically work for an outfitter, who takes the bulk of the fee in return for the permits, insurance and marketing costs. It costs money to provide guide services. It's not all gas, flies and sandwiches.
As to your earlier comment about having trouble tipping a guy that makes more than you. Well, what the heck's that got do do with anything? Anyway, those guys are working a fraction of the year. Taking the daily fee and extrapolating it to weekly, monthly, or especially annual income doesn't really work.
And heaven? Come on, Eric. Untangling leaders, retrieving flies from trees, tying on flies, telling them where to cast, etc. is heaven?