The proof of work consensus model represents a tradeoff between operational efficiency and scalability, on the one hand, and the ability to operate without sufficient trust or information about the entities in the network, on the other hand. Fundamentally, however, the financial industry does not operate as a trustless network.
Rather, the industry has long specialized in the collection and analysis of information about  9  Lael Brainard, “The Use of Distributed Ledger Technologies in Payment, Clearing, and Settlement” (speech delivered at the Institute of International Finance Blockchain Roundtable, Washington, DC, April 14, 2016), https://www.federalreserve.gov/newsevents/speech/brainard20160414a.htm; and Lael Brainard, “Distributed Ledger Technology: Implications for Payments, Clearing, and Settlement” (speech delivered at the Institute of International Finance Annual Meeting Panel on Blockchain, Washington, DC, October 7, 2016), https://www.federalreserve.gov/newsevents/speech/brainard20161007a.htm.