A comp package has a salary number, it also has bonuses, commissions, stocks, options, IP ownership, holidays, work from home time, days/week, travel requirements, travel policy, mat/pat leave, non-competes, and myriad other options that effect the salary number you arrive at.
If you agree to a salary number without taking these into account, they will necessarily disadvantage you on these.
When someone asks, what is your salary expectation, you answer, we're using the same market data and it's really a question of the total package.
A lot of people are only interested in deals that screw you. This is a super fast filter to find them.
It's a little hard to tell what your argument is. You seem to be saying that some people negotiate agreements piecemeal rather than by laying all of their demands on the table at once, which is true, and that this necessarily disadvantages one of the participants in the agreement, which doesn't seem plausible. But I am at a loss to discover either a more plausible meaning in your comment or any way in which this discussion is relevant to the question of whether salary negotiation is zero-sum, negative-sum, or positive-sum.
