power corrupts

why is it that the same people who have told me i need to have an open mind at work, and be open to new ideas, are the same people who get upset at someone when they have a better idea? i work my ass off to come up with the best solution to a problem, and then i show that it is the best solution. so what do they do? the throw all my work out the window and cram there solution to the same problem down my throat. so why should i bother to have an idea? why should i try to find the best solution? i mean, if all of my work will be thrown out the window, there is no point in me wasting all that time. but what i love, is after i implement there idea, get it running, and i setup my idea, and get it working, and put the two side by side, and show why my idea is so much better they say "it doesent matter" and continue on with there plan, instead of opening there eyes to the possibility that someone other than there selves came up with a good idea they want to extinguish all hope of free thinking, and prove that they are truly in charge, and just as closed minded as they accuse me of being.