OK, but if a larger percentage of Swiss residents emigrated there for the favorable tax laws than emigrated to the US for the same reason, that could inflate Swiss GDP, i.e., make the Swiss per-capita GDP an overly optimistic measure of what life is like for Swiss residents who haven't acquired wealth outside Switzerland.
OK, but if someone who made a fortune in Germany moves to Switzerland and buys a Mercedes, does that not add about $50 K to Swiss GDP? The reasons I suspect it might are (1) GDP is essentially a measure of economic activity, i.e., transactions, and (2) how all of the small tax shelters, Monaco, Lichtenstein, etc, have very high per-capita GDP.
Regarding (1), it is possible that living in a tax shelter gives residents without a fortune more opportunities to make money than living in a country like Germany or the US does, but I lean towards the possibility that per-capita GDP is simply inaccurate or flawed as measure of the economic prospects of the residents who don't have fortunes.
Also, Singapore's per-capita GDP is very high compared to the personal income of its human residents (I have read) and I figure that was because a large fraction of Singapore's businesses are owned by non-Singaporeans (which has been the case, BTW, since Singapore's founding by British trading interests).
