Who is responsible for the currency in use?
Well, if you listen to the banks, we are. If you request $2.00 bills, then the banks will order them, and you will get to use them, (along side your one dollar coins.)
If you request paper dollars, well then, the banks will give you those. If you request dollar coins, then you should get those.
So, do you bother to request NEW paper bills, or do you just take what they give you?