http://www.nbcnews.com/news/world/why-american-students-are-...
It's very unlikely that the uptick in expatriation is due to a recent increase in the number of US students enrolled overseas. It takes 6-8 years of residency to get German citizenship, and while I don't know the details for Germany, in Sweden that excludes residency as a student.
That doesn't sound any slower than the US - it'll probably take me around 8 years of post-student residency to become a US citizen (3 on H1-B, then 5 on a green card - and bear in mind it's much faster for me than for someone born in India or China, who face massively backlogged green card quotas).
A lot of people fixate on citizenship, but permanent residency is 99% as good as citizenship. Ask any green card holder, they'll tell you the real challenge is getting the green card. The subsequent 5 year wait for US citizenship is gravy by comparison.
While permanent residency might be a possible substitute, the lack of any citizenship will likely make it more difficult to travel to another country, and there may be legal problems should you have a child as a stateless mother.
He didn't say that it was.
Likely not. If they're so angry at paying taxes to the country that helped them build their wealth, they're likely already employing several other ways to cheat on taxes.