The super-rich only get away with that kind of stuff because their freinds in politics make sure not to do anything effective to change the law, so they can't get away with it.

It wouldn't be hard to work out tax laws that would catch them. Basically, where it can be shown, on the balance of probabilities, that some adjustment to the business affairs of a person
- I mean the way they get paid and so forth - is in existance in order to avoid paying taxes for which they would otherwise be liable, this should be treated and punished as attempted tax evasion.

And accountants who devise such tricks should be legally and professionally liable as co-conspirators in an attempt to defraud the public. (And "person" would include corporate persons.)