I do think cabulb was partially right though. If you're looking at what is available, you have:
a) jump in a lf and join the police,
b) jump in a fighter/bomber/cap and patrol,
c) jump in a bomber/gb and blow some traders/lawfuls up, all the while getting credits.
@Ivan : offtopic: Take the mojave-NY gate or westgate -> Manhatten lanes, there is always at least one pirate there. Hard to catch when sitting there pew-pewing the lanes?