I highly doubt that the speculators will agree with that. Rates are used as reference. You would be creating yet another one. The affect is not just physical, it is expectation.
The market forces are part of the system. I think that changing the system is the only way around that. A good idea but requires more than just desire to do so.
The interference is what central banks do. Monetary policy, while for the most part useless, is based on that tenet. So, change the system and that interference goes away.
Thus, again, the only way I see of implementing the idea is by a radical change to the framework of the system. I like the idea but Clinton would never go for it. Especially with her backers.

"The liberals can understand everything but people who don't understand them."
Lenny Bruce

"The cleverest of all, in my opinion, is the man who calls himself a fool at least once a month."
Dostoevsky