This is really smoke and mirrors though. Moving the cash into the repo market doesn't change anything, other than now it's an "asset" instead of a "liability." Yes, there are obviously legal differences here, but it's still the same amount of cash owned by the same entity, except now they're getting paid just to park it overnight.
I'm not saying the reverse repo market is nonsense. I'm saying the way the government has structured assets and liabilities in this instance is bizarre and seems like musical chairs. I've actually read up on this and am happy for someone to explain it to me further, but it really seems like they're just inventing new ways to kick the can down the road. I don't think they're actually solving anything; they're just making the problem worse and hiding the symptoms.