* their abysmal greed and asocial psyche: When you already have billions, what does it matter if you pay any percentage in taxes? How does it have any material or imaterial impact on your quality of life if you contribute back to society a fraction of what it gifted you with?
* their deep fear of the societies they plunder: most people do accept some spread in wealth distribution if it is somehow "legitimate" and "kosher". Hidding their tracks and actions in complex constructions is how to engineer top-heavy, artificial, pyramids of wealth and power that exceed what would be acceptable under the cleansing light of transparency