are there examples of unions that have started around a focus on the ethics of the services they provide? unions traditionally start locally, around issues for which the locality is a hotspot, which is why they usually focus on pay and working conditions. it's also easier to get a large group to agree on a set of improvements to working conditions vs a set of ethical boundaries.
actually, it looks like this is happening inside Google right now. DeepMind workers are unionizing, and most of their demands revolve around ethical boundaries and the right to refuse to contribute based on ethical grounds.