all people with big money are criminals. there are no good ways to get and keep power and big money when people who compete with you there have a possibility to play outside of common rules
to kill someone is just one of ways to overcome "rules". there are no holly ones there

rules are made to control people. but when you have power - you have more possibilities to avoid a control above you, you may break laws without negative consequences and you even need to do it, as your opponents ignore laws and common ethics. it's impossibly to win when you play with cheaters without your own cheating

just remove from your heads what medias and education tells you about the world
capitalism is criminal system in its essence. the higher you stay there - the lesser holly you are
at best you allow others to have dirty hands and you use the money they allow you to have. when you directly rule by your bussiness deals - you must be a criminal or you'll fail