I have checked out the above message by George Elerick, and I agree ethics is not something we do but rather is who we are. The performance-based concept of ethics is self-centred, which is about looking good in front of others. Yes, in this sense, ethics is tied up with capitalism because capitalism is based on self-centredness instead of other-centredness.
As he pointed out, Paul wrote that we are all one in Christ, and our identity is based on who we are in Christ and not based on how we perform. It reminds me of a blog I posted on grace and ethics, based on a blog by Peter Rollins.