Part of me wonders if the diversity quota debate could disappear if passionate tech companies invested educational resources in communities where they are seeing a lack of diversity. For example, instead of biasing your recruitment or hiring process, invest money in underprivileged communities for tech education...computer labs, free teaching resources etc. Then your pool of diverse qualified candidates will be larger by virtue of helping them at an earlier stage, and the sigma of "you only got hired because of your race/gender" will largely go away.