Off the top of my head, I can think of two easy ways to “destroy” the banking industry:

  1. Have two large GSEs begin deliberately mis-rating loans,
    → then have the private sector imitate the practice. (This is exactly what happened circa 2008)
  1. Require banks to invest primarily in “safe” gov’t bonds with artificially-low interest, and make risky loans
    → then pull the rug out from under them by raising rates suddenly (This is what is happening now.)