http://www.merriam-webster.com/dictionary/negotiating
"to arrange for or bring about through conference, discussion, and compromise <negotiate a treaty>"
It is not negotiating if you go in and say "This is what we want, and we are taking it. Type up the contract and we'll pass it to the membership. That example lacks conference, discussion, and compromise, and thus is not negotiating. I am NOT saying one needs to give up X to get X back. Negotiations can involving giving up X to get Y, or taking 1/2 X and getting 1 1/2 Y in return. If you really think negotiations do not involve any give and take I will seriously have to call into question your mental fitness for your CURRENT job as well as the one you are seeking.
I agree with what else you said (accidentally snipped it out of this), when times are good we should get more because the company will want to take when times are bad. I also agree that when times are bad sacrifices must be made. I'm also well aware that the company will be in 'dire straights' in negotiations even when the company is doing quite well. My point, however, still stands. There MUST be give and take. It IS absolute, because for there not to be give and take it's not negotiations, it's simply demands. I'd prefer people representing me be mature and negotiate then be childish and issue ultimatums. Let the company sink to that level.