What do all of you think about this ¿rather extreme? sample of affirmative action?
I don't think it is a good idea.
One of the biggest problems with these affirmative action programs is the stigma they leave for everyone in the "protected" category. The people who should be maddest about this policy are the talented, hard working, well qualified women who end up in a position of high responsibility. They would have gotten the job anyway based on their record of performance, but because of policies like these no one will ever know that for sure.
The flip side: If the pool of women candidates for a set of jobs is much smaller than the number of male candidates and yet half of the openings must still be filled by women, it's highly likely that the women picked are going to be less qualified and do a less satisfactory job than the men. When people see this poor performance in action (both inside the organization and outside the organization) it reinforces every negative stereotype that is out there--people won't blame the dumb policy, they blame the "dumb" women that they see every day.
All of this seems like the most sure-fire way to hobble women (or any other "favored" group) and prevent real progress.