This seems vaguely similar to what people leaving Canada for tax purposes - they're assumed to logically sell all of their goods that year so as to pay tax on t

This seems vaguely similar to what people leaving Canada for tax purposes - they're assumed to logically sell all of their goods that year so as to pay tax on the gain/loss. The US taxes citizens all the time, which has an advantage in this case. Doesn't cost $$, merely requires extra forms and filings. Renouncing citizenship, to first order, sounds like leaving Canada.