It's something of a default. Rule of law is hardly a natural state; it's a boulder at the top of a hill which requires effort to get and keep it there. The real question is "how did impartial business cultures develop and how can they be transitioned to?"

The books of Hernando de Soto have some good background on doing this in Peru. A key element of it is recognising which rules are unenforceable and repealing them, so instead of a thicket of unobeyable, intermittently enforced law you get a small robust core of law that's actually enforced fairly.