They have not even imagined how right they are
Having said that I would much rather use the term “slow” than “curb” because it is the speed of how the financial resources move that causes the most damages.
But let me put forward a much more important comment. When the authors say that one should not be “too optimistic about the potential of prudential regulation to stem excessive risk-taking” they are more right than they have imagined in their wildest dreams or wildest hypothesis. In fact, it was precisely the running away from the risks, forced upon the financial market by the regulators through their minimum capital requirements for the banks and that was based exclusively on risk-assessments carried out by the regulator’s own outsourced risk overseers, the credit rating agencies that set us up to all what is currently happening.