Their point was that the presence of wealth outside of the US is not an indicator of more "correct" economic policy.
>That's true of basically 85% of the world.
That's precisely why the argument of "if we tax the rich they'll just take their wealth elsewhere" doesn't stack up. If it happens, when it happens, it happens because we made a conscious decision to enable it.
That's true of basically 85% of the world. The only really independent countries, as far as I can tell are the US, China and Russia with France, Germany, UK and India on the edge.
I'm not sure what your point is unless you think the US will suddenly reverse its centuries old policy and start colonizing the world.