Another comment here also mentioned that consequential actions are abstracted in large companies; group diffusion of responsibility gently removes most bad decisions that would normally make a person think remorsefully about what they’ve done.

Having an ethics board would be a top-down solution. The bottom-up, which I’m more fond of, is releasing literature and material to anyone working in tech about how their work could actually affect their end users; we need to help each other develop more self-awareness of the results of our work instead of the breadth of material about the work itself.