It's not possible. Government jobs (except for those for the equivalent of flag officers in the military) are categorized at certain pay levels. The highest pay level tops out around 160K. I think the original intent was to avoid politicians paying their friends extreme salaries, which is how gov't jobs used to work (see "Spoils System).

This article is entirely about another alternative. Which is to pay below private market rates but exposure to otherwise inaccessible problems.

Feel free to tell that to Congress.