The top paid career is programming.
There are more billionaires who can debug code than solve PDEs, or who trade any type of financial instrument.
I cite Google, Facebook, Microsoft, Ziff, et al, and of course a respectable number of traders can do serious programming.
Next after programming is murder. Mugabe, Putin, Saddam, Suharto, and some respectable number of the PRC Chinese leadership have killed impressive numbers of people in order to get rich and retain/gain power.
Of course that's not the average...
Most programmers do not get very rich, and most murderers die broke and young.