A federal currency where the government knows every single thing you purchase, and indeed controls what is allowed to be purchased and by who - such a system can and will be abused, no question.
Government is the worst place to try to contain such a system since government employees are protected from any consequences of misuse, and can only be removed or policy altered at best indirectly through voting in the right people, and hoping they do what they will say.
Hopefully there are enough people left in the U.S. that can see the major problems inherent in such a system that they will push back.
In the current system most purchases are going through Visa or Mastercard who track everything and sell your data to whomever is paying. Oh, and if you are doing anything suspicious they will definitely let the government know about it. If you are in a business they don't like such as cannabis sales or porn they may cut you off as well.
With the Fed doing it directly at least it's not being sold to third parties and people trying to quit smoking aren't getting cigarette coupons in the mail.
The Fed at least in theory is separated from political influence. Is it true in practice? Not entirely sure but I trust them more than I trust the corporations currently running the payment systems.
Why did he not come public and tell the world who he is?
Even Deep Throat came public, eventually.
The only reason is that it was obviously a lie. None of his claims ever made any sense what so ever, he is obviously scared of the backlash from his followers as they realize how badly he lied to them.
He could come out tomorrow and say,
"QAnon is a hoax, I made the whole thing up. Thanks for the money, suckers!"
and those followers would think it was some kind of coverup to keep them from the truth.
"Don't talk to me about disclaimers! I invented disclaimers!" -- The Censored Hacker