> Interest on the reserve assets will be used to cover the costs of the system, ensure low transaction fees, pay dividends to investors who provided capital to jumpstart the ecosystem (read “The Libra Association” here), and support further growth and adoption. The rules for allocating interest on the reserve will be set in advance and will be overseen by the Libra Association. Users of Libra do not receive a return from the reserve.

Forget about the cryptography and "blockchain" this system will use. The real innovation here is financial in nature. Only it's not really an innovation.

I doubt today's race to negative interest rates will be kind to Libra validators, who will be demanding a fat payout sooner or later for the loss of business on highly lucrative credit cards.

There's only one way to fund this beast: fractional reserve and ever more risky investments. The temptation will be enormous. The justifications true and well-intentioned. The outcome predictable to anyone who has paid attention.

Think Tether, but orders of magnitude larger.