Author missed one more method of corruption: writing books. These politicians write books, sometimes using ghost writers. And the publisher pays them millions

Author missed one more method of corruption: writing books. These politicians write books, sometimes using ghost writers. And the publisher pays them millions of dollars, then the said politician goes on book tours and visits their 'patrons' in wealthy towns like Los Altos Hills, Atherton, etc. Some billionaires buy like 50,000 copies, then incinerate them without being found. There are even trustworthy contractors that incinerate such books. That's how it goes.