Increased credit needed to rescue the economy recovering from economic crisis, which in turn contributed to inflation, then addressed by hiking interest rates to soak up excess money, which in turn made bonds less attracting, which with depositor withdrawals to cover loses due to the crisis caused banks to fall apart because they had to sell bonds at a loss and cover differences by selling their other assets, which in turn will require additional credit injected into the system to avert more collapses, which brings us back to our first problem.