If people choose to emigrate to places based on their agreement with current policy (which you would expect if we can achieve some parity in terms of opportunit

If people choose to emigrate to places based on their agreement with current policy (which you would expect if we can achieve some parity in terms of opportunity) then no. In regards to the condition of conflicting interests, all you really have is mutual agreement among all involved parties. In this case, you agree to make less noise late at night in exchange for my agreement not to turn the neighborhood against you by telling everyone what a dick you are. Unfortunately given the dissolution of community reputation isn't the effective check it once was, and as a result we end up being both alienated and mired in bureaucracy.