Not nearly enough to change behaviour. I knew fully well the impact of buying A vs B in a recent purchase decision - A is unethical but B was a full $1000 more. It was hard to suck it up and do the right thing. If we want to effect change, just add a tax that equalizes unfair advantages - paying unliveable wage? That tax should then be used to pay a basic income here. If manufacturers still want to keep their facilities elsewhere - for non-destructive reasons - so be it.
