I’m not sure what BwanaBob is trying to do with his scheme, but it reminds me of the script changeovers in the military.
For those of you who don’t know how it work(s)(ed), at least in the Vietnam era, when a US military person arrived in Vietnam, he exchanged all greenbacks for military script of the same denominations. They were cheaply printed, smaller-than-dollar paper slips, and intended to be used only for on-base transactions. For off-base, we were supposed to convert any amount(s) we wished into the local currency, piasters.
However, contact between locals and GIs, as you might expect, was common, and the soda sellers would take US military script as well as piasters. Convenient for all.
Then one day, without warning to any but the highest officers, all US bases were shut down and we were forced to exchange our script for a different series, with a different color scheme. We could exhange as much as we wanted on that day, but knew that the following day, the old script would be worthless and could not be exchanged.
The ostensible purpose was to screw all the black market dealers, but it also screwed any legitimate merchants who had accepted script on faith, as they were not allowed to convert to the new series. And for a long time after that, no local would accept US script of any kind. Personally, I think it was just the government’s way of making money by defaulting on their debts and thumbing their nose at anyone who complained.
This procedure was the subject of a MASH episode, so it wasn’t a one-time thing.
If the US did the same thing with greenbacks, I suspect the world would lose faith in us just like the Vietnamese did in the military script which they innocently traded.