>To reverse the gov must buy the bond back with money from general taxation, on doing so the bond is redeemed and destroyed, and the central bank erases the mon

>To reverse the gov must buy the bond back with money from general taxation, on doing so the bond is redeemed and destroyed, and the central bank erases the money it received back in tandem with the bond. But this is already a normal part of the process. The government rolls over its debt as bonds mature, so the Fed can just take the money when the bond matures and not buy new bonds. That would force the government to borrow existing money from individuals and other countries instead of creating new money through the Fed, effectively taking that cash out of circulation at the cost of an increase in interest rates. Also, the Fed bought corporate bonds under QE, so this isn't just a question of the government printing money to cover budget shortfalls.