Well, all I can say is that the mkt doesn't seem to think Fed's QE was monetization. It thought that maybe for a millisecond in 2011, but we've moved on since then.
As to how trustworthy this data is, my attitude to this is one of pragmatic cynicism. I generally believe that grand government conspiracies are unlikely, because they're difficult to implement, especially covertly, and governments are just not that good. So, unless there's specific evidence to the contrary, I don't see anything too bizarre in there. Obviously, other than the effectively unfunded SocSec and Medicare deficits, but this is neither here nor there.
You might want to verse yourself in the 60,000 hacked Hillary emails. Government conspiracies and corruption abound. I assure you
The point is the fed lied. They said it wasn't monetization. i don't trust much coming out of the government. Especially bls and the fed
