American don't need things like that to hide their money from taxation. There are plenty of mechanisms in the US Tax Code alone to do that. That's not the case in foreign countries, which is why they need to use outside scams.

All you have to do is look at the Clinton Money Laundry, i.e. "Foundation."

Look at Mitt Romney who has been able to finagle the tax code to pass millions and millions of dollars to his kids without paying taxes.

Look at the corporations that legally park billions of dollars offshore -- and include that in their annual report.

Why would they need to funnel it through Panama?