With all the talk about the necessity for teamwork and collaboration given the further decentralizing of the Global Economy . . . then why are resumes all about marketing our individual accomplishments?

As an Executive Recruiter, here's the true irony I can pass on:

If a candidate or job seeker has the word 'team' in their resume more than 2 - 3 times, HR often perceives that the individual is stressing collaborative accomplishments because they have none to claim as their own.

Yes, unfortunate . . . but perception dictates whether you're selected or not.  In this case, it just doesn't make sense.