This is horrible, in my opinion.
I GM a lot and never have and never would expect bribes. I do not cater to "pay-to-win" environments and never would play in one myself.
One of my favorite things about Pathfinder is a cost thing. I want to be able to tell my players they need a core rulebook, a copy of anything else they want to pull sources from, a character sheet (or 50 cents to print on at the library down the street), a pencil, and some dice. Period.
Nobody should have to expense for a chocolate cake, 3 cookies, a bag of chips, a coffee (black - I take my coffee black), and that thing on the shelf I have been eyeing in order to stay on the curve with other players.
I believe that a GM should be as impartial as possible. The world he or she is portraying is a sterile environment compared to the real-world and allowing bribes is just another way to ruin the magic and make immersion even harder.
