People have the wrong idea when it comes to guides. For some reason they think you should just catch fish after fish with a guide. It doesn't work like that guide have good and bad days just like us. So to tip more because you caught a DD isn't the way it should work. There are alot more to a guide trip then just catching fish. Maybe he taught you a technique or electronics that you didn't know and wouldn't know without him showing you. So don't base your trip off of fish catching if he does you right take care of him. I usually by breakfast,lunch, and $100 dollar tip.
Have you ever considered that you have the wrong idea?
I take a lot of guide trips. The $500 is for the techniques he taught me or the nugget I learned with the electronics. That's a given and are the point of the trip itself. It's also a handsome fee which he gets 100% of. Some of the trips we are in my boat but I still pay whatever he's asking with a smile on my face because I still learn what I'm there to learn. I also gladly pay for breakfast and lunch.
I've also been on more guided trips than I care to admit where we were skunked. He doesn't get a lesser fee for the poor results does he? Of course not. Sometimes the fish don't cooperate and that's out of his control. He will still leave with $500 in his hand to take home to his family. Now if we have a great day and the fish are biting and we get to catch a few good ones there's an extra $50 at the end of the day. He didn't do anything different but the stars aligned and we got better results and he gets an extra 10% because I leave with a big smile on my face and some stories to tell.
Years ago on day two of a three day trip to Mexico, I told our guide that he got a $100 bill if I caught a DD which would have been my new PB at the time. My take is.... I can catch small fish here and I go to Mexico for the freaks. His ears perked up and he had me change the color of my XD 10 and we fished very few spots that day. We kept going back to this same spot over and over, in between fishing the other locations on the lake. My buddy and I realized what he was doing..... he knew something. We were catching fish on the other locations but not here yet he kept coming back here. At 3:00 in the afternoon I caught my new PB at 10.3 pounds and I feel certain that we wouldn't have done so without the carrot I waved first thing that morning.
If $500 for a day of fishing is an unfair wage then raise the fee. Don't assume most of us are going to throw down an extra $100 as the norm. To most of us, that's a lot of coin. You say this "isn't the way it should work" and I beg to differ. When I tip $100 something special has happened.... He's kept us longer, we got great results, or for some reason I just thought it was deserved. Never just "because."