Everyone has to decide. I often worked on "joint works" where most of the artists involved in the creative process will not own the copyrights in those works. e.g. "Work for hire." I know a lot of photographers who shoot catalogs for hire, and are just glad for the work (which averages in my area about $800 a day, the same as for graphic design). Not sure what one would do with photos of GAP socks anyway?
Of course if the creative is powerful enough, a movie score for instance, will not become part of copyright of the entire movie, and never if it is pre-existing.
Photos can certainly retain a separate copyright, but in my case, shooting film stills for continuity, was just not an option. I am not Annie Leibovitz. 🙂
People have the right to charge whatever they wish, from zero, to huge amounts. Someone will always say "they" are charging too little, or what they are charging is way too much.
All that matters is what they are paying me. If my work is perceived as no more desirable than the cheaper guy (and it really does not matter how much cheaper), then I am most likely screwed, at least from the perspective of that potential client.