they truly do get away with it.
look at the illuminati, ultra evil their whole lives, get everything they want and die.
based on that revelation I'd say karma is a trick by evil entities at least on earth, perhaps different in space and other planets.
if you're evil enough, evil karma doesn't touch you.
if you're good enough, obviously good karma doesn't touch you either(tiny bit only).
everything is skewed to encourage evil behavior.
I'd be weary referring to a karma system as justice.
on earth no good deed goes unpunished. we all know that.
the nicest, most benevolent, most self sacrificing, age horribly, lifetime of poverty, usually in chronic pain, lifetime of emotional and mental abuse and die crazy. Obviously the buddhist-christian system of karma has been overtaken by evil.
everyone assumes karma is fufilled in the next life..but oh wait, when you don't remember anything cuz you're mindwiped. Whoops, guess that whole 'learning' thing doesn't work at all. Only lesson people learn is that the universe and god is cruel.
the only true karma is a healing. No evil-doer has an intact conscience. When that is fully restored, evil people then feel remorse and cannot forgive themselves resulting in stalled spiritual progress.
That's the only real karma.