This was possible in the past for Americans, but it doesn't make sense anymore. That's the truth. The secretive Swiss banks and numbered accounts you read about in adventure novels as a kid are all reporting on US citizens now.
It doesn't matter how much resources Eric Schmidt has, the US government has more resources and power than Eric Schmidt. Especially given he's a widely known public figure, he'd be the perfect target of any investigation.
US taxes are already extremely favorable to the rich. Do you seriously think he'd risk his freedom and reputation over something so stupid?