I believe

The fundamental part of every legal, political, and financial system that has ever existed and one which will not be solved by technology. The desire to eliminate risk has become synonymous with the desire to eliminate the need for trust and confidence in individuals. In this contrarian's opinion The Root of All Evil in the present system is the any social device which seeks to substitute data, policy , Rule, or algorithm for judgement, confidence, and trust.

so in the same way that rules, PlayBook, and policy override the judgement and confidence of and in individuals in large organisations, the desire to eliminate the need for trusted intermediaries in a distributed Ledger system has the same fundamental shortcoming.

By way of analogy, the conversion of a moral obligation (pick your children up promptly at the conclusion of today's session) with a financial one parents will be charged £10 per hour for late collection of children after the session -as in San Ariely's example of the childcare Centre) has the same effect.