Michael, I just deleted a very angry post. If you will reread yours, you basically called out anyone who tipped more than your 10% "norm" an egoist for tipping that amount and apparently a liar if they gave any other reason for that tip. In several previous posts, I explained what I tipped and why. In several cases (though not all), that exceeded your 10% "norm." I will assume you really weren't calling me out personally as an egotistical liar - and I will admit that I am a Southerner and fairly touchy about such things. I also would suggest, pronouncing the "norm" for the rest of the hunting (maybe service?) industry is 10% might be challenged as a rather arrogantly egotistical position to take. Just saying.
If you would get out more, you would find the "norm" for restaurant industry has been 15 % for at least fifty years in the US - at least where I have eaten. If you charter a boat in the Gulf, off Hatteras, in the Caribbean, wherever, you will often see a small sign letting you know that the mate works for tips and 15% is the norm (sometimes 20%). If your PH makes a suggestion, he is essentially doing the same thing. If you don't like that, fine - buy a cane pole or get another outfitter.
Finally, most successful people that I know got that way through hard work and some luck along the way. They weren't trust fund babies or the beneficiaries of some rich uncle's estate. If some of those people occasionally want to be generous with some of that good fortune, then I think that speaks well of them. It is a generosity of spirit which probably should be applauded rather than condemned or somehow seen as threatening.