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I feel for you because your chosen profession is a difficult one in which to make money, and I would dare say most pro's who make a liveable income do so from commercial clients who need to pay royalties or for limited licenses to use images (that is also changing rapidly - they too are demanding all rights), because I find it hard to believe many pro's if any at all, can make a liveable income from the general publics demand.
Again, I have to ask, are photographers any different to the tight, unrealistic clients they complain about? When was the last time you went into a pro camera supplier here in Australia and paid the full Australian retail asking price of a pro piece of glass or camera body? Do those same pro's who are crying about customer expectations ever pay HN, DSE, Ted's whichever retailer, the marked price for gear or, do they too seek a discount not only for camera gear, but for their lounge, new car, 60" LCD TV etc which I'm sure the retailer is often thinking is ridiculous.
The pot often calls the kettle black, hypocrisy at it's finest in alot of cases I think, and it seems some get very defensive and teary when the shoe is on the other foot, but that isn't often something pro's who cry about tight clients like to talk about......