[runako]

At best, you're referring only to US expatriates. The article you linked does not apply to people living in the US at all.

Also, political innuendo aside, Sivers doesn't mention tax avoidance in his reasons for moving to Singapore: http://sivers.org/singapore

[jlgreco]

IIRC, it is impossible to renounce citizenship (and have it be recognized by the US government) while in the US (being inside a US embassy is I believe not counted as being in the US, and is indeed required). Expatriation is assumed whenever you are talking about (American) citizenship renunciation.

[waterlesscloud]

The law in question defines things in such a way that it's assumed you are renouncing your citizenship for tax purposes if your income or net worth are over certain thresholds. It provides for exceptions under specific conditions and allows for govt officials to grant documented exceptions if you can convince them to do so.

The assumption, though, is probably correct far more often than not.

[branola]

Assuming it's true that he's dodging taxes, why would he want to rub everyone's noses in it? I wouldn't expect it to be a particularly well received blog post for example, not to mention potentially endangering his ability to successfully expatriate - since I believe you are not 'officially' allowed to do so for tax reasons.

[rdtsc]

Because if he did he would be in trouble. Renouncing citizenship for the purpose of tax avoidance is not something US govt. likes very much.