Delware, not Switzerland, is the tax shelter
Most people are unaware that Delaware set out to be a corporate shelter jurisdiction, in terms of tax and of privacy. In the 70s or 80s, IIRC.
* Tax=0% , essentially
* Privacy rules ~same as the Switzerland of yore. (CH had to crank open the gates after various scandals eg Panama Papers)
Most of the "traditional" tax-/oversight- dodging jurisdictions have in fact had to open up sharply in the last decade or so -- don't bother with Switzerland, for example. But the non-traditional / unknown-to-nonbusinessmen jurisdictions have blossomed. Including various surprising pockets within the USofA like Delaware.