I'm very biased, but who isn't? Just because you don't agree with a common practice doesn't mean that you are justified in doing the opposite. Yeah, it's probably the most economically intelligent system, but that's just how it's evolved. I'm not too fond of tipping waiters at restuarants, coffee shops, etc, but it's a practice we've seemed to have agreed upon as a society, so I go along and shell out an extra 15%-20% for the service. The same seems to be true for fishing guides (although the % given varies quite a bit more). Guides, in my experience, do not work any harder for people they believe to be good tippers. And the measure of a successful day is not a large tip for most. Stop crying about it and give your guide a tip.