Banks that operate in tax havens but that also have branches in the US or a tax treaty country have already set the precident of divulging account info (most especially if they have any operations in the US). Most legitimate banks now require a copy of your passport before opening an account due to drug money laundering.
Would be the same for a broker - i.e., if a Merril Lynch had an office in the Turks & Caicos for instance, the IRS would be on them for record disclosure and with all the anti-laundering regulations it would be tough for them to hold out.
To set up your own bank isn't trivial, although some books out there make it seem so. The cost is fairly high - usually $20,000+ and you have to demonstrate some level of experience.
It would be easier and cleaner to buy yourself Belizean citizenship and then use a Belize passport to open "foreign citizen" accounts. It's easier and cleaner, but the IRS would still consider it fraud as long as you continued to also hold your US citizenship.
While you can form a foreign corporation anonymously (at least for the most part - there is still a potentially accessible record if you use a company with any operations in the US to form that corporation for you), but the point is that "legally" you are still required to report earnings and the fact that you control the accounts and (I think) own that company.
They've tied up or embroidered around most of the old loopholes so if you're caught, you've got no grey area to wiggle in. Failure to report (especially earnings) is tax fraud. As I recall, there are some specific questions on the tax forms now that ask if you control any foreign accounts or corporations. If you lie and get caught, you're automatically presumed (and easily proven) to have committed fraud.
Committing a crime and not getting caught (at least right away) isn't the same as being legal.
Also, the effort to do all of this isn't trivial (and would be a lot of effort to try to keep all of your tracks covered if you were engaging in tax fraud), so you'd need a pretty good chunk of annual deferrable earnings to make it worthwhile. Even then, repatriating the funds later could also open you to being caught.
I absolutely agree about the 50%+ tax issue. Adding up all the various Fed, State, FICA, etc. taxes, it's easy to hit 50%+. Which of course is absolutely ridiculous. It's been proven time and again that every dollar the government takes is dead money, while every dollar they leave in our pockets ultimately works to benefit the economy.
The problem is that the bafoons in Washington (who keep giving themselves raises because they think they're doing such a bang up job) don't understand basic monetary and economic principles, have completely disconnected themselves from reality, and are only interested in pandering to those who can help keep them in their kooshy jobs the best - even to the detriment of the rest of us.
Afterall, does anyone really believe that Strom Thurmond is interested in looking out for the best interests of the country? Besides, between Civil War flashbacks and insuring a continuing supply of tannis leaves, he can't possibly have much time left in the day.
