The same applies to markets too. In general, no static human-made system won't eventually be corrupted if some humans stand to gain from that corruption. Corruption needs to be fought actively and continuously.

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On a tangent, I don't believe regulation-free markets are even possible; power and money are inherently connected (money itself being a form of power), so you'll always have "money in politics", and if governments were to suddenly disappear, then private actors with money would start performing their functions.