PS - The answers to all of these questions is contained within the article.
FTA:
"Fatca provisions impose no new obligations on US citizens living abroad... US taxpayers, including US citizens living abroad, are required to comply with US tax laws," he says.
No, this sounds more like people who might have fudged some numbers now worrying that the IRS is going to find out and realizing that their citizenship isn't worth the yearly bill.
I take exception to your characterization of "fudging numbers". We all fudge the numbers of our tax returns, even when filing in the US. How many people really do anything but use TurboTax and hope for the best? I know I do. I can't possibly know everything about US tax law. I hope TurboTax does, but I have no guarantee, and it's my ass on the line if it screws up. I see no difference between that and the expats mentioned in the article, except the help they have to buy in is far more expensive.
I don't see any mention of tax-dodging in the paragraph above. Which part of paying $2000 (and maybe soon $5000) to file taxes, and banks turning away American customers, don't you understand?
The non resident citizen tax returns can become very complicated in the situation where the non resident US citizen is married to a non resident foreigner. The tax forms don't even support this configuration - the spouse must have a social security number. The foreign spouse must then apply for a special "non resident alien" social security number, for the special purpose of being able to file taxes in a country they are not even allowed to enter without a visa.
And how exactly do you determine the value of your shared assets in dollars? Have you made capital gain every time the dollar fluctuates against the local currency? Since we bought our home, our property has dropped significantly in value in the currency we earn our wages in, but theoretically gained a bit in dollars, so how can we be sure this doesn't add up to exceed $50,000? The only way to be sure is to hire an expert figure it out for you, for several thousand $. They are now charging more for their services because of the higher risks and responsibilities involved.
The net amount we have to pay in that country one of us isn't allowed to enter without a visa has always added up to $0 because the extremely high taxes we already pay locally (50+ percent income tax, 20+ percent sales tax, 80+ percent excise tax on fuel etc) can be deducted.
Yeah, just open a secret Swiss account, who will know.
The only thing I can think of is that maybe people are avoiding taxes in the US and their adopted country as well. After all, many countries Americans move to have such high tax rates that after deductions, their US tax liability would be quite small.