It turns out that rich Americans have less need for tax havens than their comrades elsewhere. “People in other countries pay a lot more in taxes than we do,” says international tax expert Lee Sheppard, contributing editor at Tax Analysts. “In other countries, nearly every rich person has a tax haven bank account. Proportionately, the United States doesn't have as large a problem.”

The top federal income tax rate in the United States is 39.6%, with a threshold of about $415,000 in income for a single filer. In much of Europe, the top rate is a few points higher—but it kicks in at much lower income levels. As for investment income, the capital gains rate in the U.S. is 20%, and 15% on the type of investment known as “carried interest.” In a few investor-friendly European countries—Switzerland, Luxembourg, the Netherlands—the capital gains rate is 0. But in most of Europe it ranges from 15% to 42%. And few countries have as many generous tax deductions as the United States.

http://finance.yahoo.com/news/panama-papers-why-no-americans-193702690.html

Seen through one lens, this whole scandal basically boils down to "World shocked to learn that rich people pay American tax rates."