Homicide would definitely seem to correlate with robbery and extortion, robbery by accident and extortion for the basic reason that otherwise it would be quite hard to extort as nobody would take you seriously.
I suspect that the issue of richness might be a social consideration, but they have a progressive tax code that goes up to 35% for those making more than ~ $45,000 per year and there do not appear to be any legal restrictions on maximum income.
Oh, and they have been nominally socialist since the late 80's when they got rid of the whole planned economy thing.
edit - I just thought, Vietnam strikes me as a particularly bad place to try and run an extortion racket. Whatever you try and threaten them with had better be bloody scary otherwise you run a serious risk of being laughed at by an old bloke with lots of tunneling experience.
I suspect that the issue of richness might be a social consideration, but they have a progressive tax code that goes up to 35% for those making more than ~ $45,000 per year and there do not appear to be any legal restrictions on maximum income.
Oh, and they have been nominally socialist since the late 80's when they got rid of the whole planned economy thing.
edit - I just thought, Vietnam strikes me as a particularly bad place to try and run an extortion racket. Whatever you try and threaten them with had better be bloody scary otherwise you run a serious risk of being laughed at by an old bloke with lots of tunneling experience.