Lack of consequences in this game is what allows so-called "Oh, but I am a sociopath" behaviour.
There should be penalties in place and they should scale according to crime committed.
Pirating shouldn't be a huge penalty, and it should be a viable risk. Pirating doesn't require killing someone though. It simply requires an interdiction, then either talking them into dropping cargo, or simply disable their drives, pop their cargo hatch (or use limpets) and take what you want.
HOWEVER,
Murder is obviously the biggest crime possible and should not be punished by a flat 6000 credit bounty.
Murder should be scaled in a percentage of the offenders total assets + percentage value of the victims total loss (ship + cargo). In addition a high bounty should also cause the frequency of interdictions in safe and relatively safe areas to scale exponentially as well.
As an example, lets say the percentage is set to 10%.
End result:
Victim: 20 million value ship, 30 million value cargo.
Offender: 50 million value ship, 25 million value cash and second ship worth 25 million in another system.
Murdering that victim in a controlled system:
Offender total assets : 50+25+25 = 100 million.
Victim loss: 20+30 = 50 million
100 + 50 = 150 million total x 0.10 = 15 million bounty for murdering the victim.
15 million bounty would trigger groups (3-5 ships) of bounty hunter, security / police ships of a higher combat rating (Vultures, Pythons, Anacondas) that often and frequently interdict the offender whenever they are flying in a controlled system where the bounty is active.
Key word: Consequences!
6000 bounty for someone who flies in a fully upgraded Anaconda with 500 million in cash is nothing. Who cares? It doesn't affect them whatsoever.
However, if you have to pay 10% of your Anaconda's total value + 10% of your 500 million, AND you keep getting interdicted 3-4 times over a 1000-2000Ls supercruise in a controlled system by groups of 3-5 high skill, fully upgraded NPC bounty hunters and police/security ships... then yeah, you will think twice before you simply blow up that Type-6 you just interdicted for no reason other than wanting to kill them.
On the flip side... if you are in an anarchy system then feel free to kill whoever you want. Noone cares because the system is not controlled by any faction. Any player venturing out into the anarcy areas should be prepared to face death. That is the whole point of a system being an anarchy, ergo not controlled, system.