I think for the whole system to work, there has to be a tax against money not put into circulation. Cfb , is it possible to design such a scheme?
Not after Mixing is implemented.
You won't get any results with this. You can just move your funds to another account you own.
I think the right direction is lowering fees nearly 0, so if someone wants to hoard is ok, but he won't see his stack grow significally.
In my opinion protecting the network is enough reward for all of us holding NxT, no need of extra fees.