Non-resident aliens are specifically excluded from paying capital gains to the US. I wonder why? The US also refuses to collect information on income earned in

Non-resident aliens are specifically excluded from paying capital gains to the US. I wonder why? The US also refuses to collect information on income earned in the US by foreign residents (currently there are some efforts to change this, being obstructed by congress). Of course if you suggest that this means the US is a tax haven then you are in for an earful. Other, bad, countries are tax havens. Never the magnificent USA! A far more equitable solution to the Saverin 'problem' would be to apply CGT to ALL US-derived gains. Most countries do this. But that is unlikely to happen as it would reduce foreign investment...