It's somewhat unclear to me what you are asking managers to do in terms of removing bias. It seems natural to preferentially reward people who push the bounds of the position, who add out sized value, and who work hard. Not rewarding these people for their efforts will lead to them leaving and finding other jobs that will reward that behavior. People have different priorities in life, different aspirations, and I'm not sure why this is a problem. Those who want to work very hard and don't pursue familial obligations lose out on the benefits of having children or spending time with a SO and in return get rewarded career wise. There's an opportunity cost either way.

If I'm totally missing the point here or am off base, please correct me.